Mari

... did you try RESET? If that doesn't work, remove the profiles, delete your printer and add new printer... or re-install Cura!

Filament diameter setting can be found in the machine-settings of your printer... Preference, Configure Cura, Printers, Machine Settings, Extruder 1...

You can make near perfect designs, but sometimes you need to redesign to make it more perfect... I like "Bench Work" and I think is fun to do 🛠️

... I did print with "support everywhere" by accident... luckily I have a set of tools that makes removal of support in small places possible (was printing OpenRC F1, there are also slots/holes for nuts)... But I like @GregValiant idea of using a support blocker 😉

Had no problems with upgrading Cura from 4.6.x to 4.7.x. All my profiles are still there!

Didn't you backup your profiles with the build-in function? Then you probably could have restored them. When installing new version, you get the question if you want to delete previous settings... I always answer with "NO".

Changing Buildplate dimensions in Cura do not change disallowed areas... There are more topics on this forum about this subject... In the folder /resources/defenitions/ you can find a "yourprinter".def.json file you can edit to change the disallowed areas, or maybe you can create a complete new printer (haven't tried this)...

Don't forget that if you have "skirt" activated, you have less buildplate volume, because the skirt has to be within the buildplate volume....

If you compare the creality_ender3.def.json and creality_ender3pro.def.json file you will see that there is less disallowed area in the Ender 3 Pro... so changing from Ender 3 to Ender 3 Pro will help!

... yes it can, but you have to change the restricted area in the settings of the printer... Changing the dimensions of the printbed in Printer settings doesn't change the restricted area! If you change the printer type from Ender 3 to Ender 3 Pro, you can see a change in restricted area of the printbed! If you want to make the restricted area smaller you have to edit a file... This is all explained in another topic on this forum, use the search-option of the forum to find it... Edit -->

Do you see "materials" in the first column on the left? Like I said - Preferences - Configure Cura - MATERIALS

Under Preferences, Configure Cura, Materials... ????

bad adhesion first layer at some parts of the buildplate... Like @GregValiant said, clean the buildplate... and make sure the bed leveled correctly! Having to work gluestick/hairspray was for me the reason not to choose a glass printbed... I switched to a flex steel sheet with Lokbuild... much much easier to work with!

I did not slice it, simply used your Gcode-file for both prints, only changed the nozzle/bed temperature via Octoprint-Control-Panel... You say you use a 0.2 nozzle, I have printed your file with a 0.4 nozzle... should have made some difference! Did you change nozzle from 0.4 to 0.2 or only in Cura? Ender 3 (Pro) has standard a 0.4 nozzle! Try changing filament, I once had a role of PLA that made my printer produce bad prints!

That should have been visible in my prints also... I used his Gcode-files, so his settings on flow etc.

... Now I have changed only the Nozzle/Bed temperatures (I know the PLA I use prints better on 210 degrees!) You can see in the front left corner that the bed adhesion is a little better than in the print before! So maybe you should test what the best Nozzle-temp is for the material you use...

I'm now printing your Gcode-file, have no problems with bed adhesion... For the PLA I use right now, the print temperature of 200 degrees is a little low, I normally print on 210 degrees (and bed temp on 50 degrees). Next print will be the same file, but only with 210/50 degrees for nozzle & bed...

Post the STL-file, so we can print it with our own settings to see if there is a difference! What material are you printing and what is the on the manufactures label for printing temperatures?

I have an Ender 3 Pro... 😉 Magnetic Flex Buildplate needs no gluestick, hairspray or whatever... just clean it with Isopropynol alcohol (70%)... You can try my Start/End-Gcode... it does work for my printer! Start: M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk M220 S100 ;Reset Feedrate M221 S100 ;Reset Flowrate M140 S{material_bed_temperature} ; start preheating the bed M104 S{material_print_temperature} ?T0 ; start preheating hotend G28 ; home M190 S{material_bed_temperature} ; heat to bed setting in Cura and WAIT M109 S{material_print_temperature} ?T0 ; heat hotend to setting in Cura and WAIT G92 E0 ;Reset Extruder G1 Z2.0 F3000 ;Move Z Axis up M300 S1000 P500 ; chirp to indicate starting to print G1 X5.1 Y20 Z0.28 F5000.0 ;Move to start position G1 X5.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line G1 X5.4 Y200.0 Z0.28 F5000.0 ;Move to side a little G1 X5.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line G92 E0 ;Reset Extruder G1 Z2.0 F3000 ;Move Z Axis up End: G91 ;Relative positionning G1 E-2 F2700 ;Retract a bit G1 E-2 Z0.2 F2400 ;Retract and raise Z G1 X5 Y5 F3000 ;Wipe out G1 Z10 ;Raise Z more G90 ;Absolute positionning G1 X0 Y{machine_depth} ;Present print M106 S0 ;Turn-off fan M104 S0 ;Turn-off hotend M140 S0 ;Turn-off bed M84 X Y E ;Disable all steppers but Z M117 Print Completed M300 S440 P200 ; Make Print Completed Tones M300 S660 P250 M300 S880 P300

Do you want so share one or more of the files that you can't slice? Load file and save it as projectfile (3MF) via SAVE or CTRL+S... post that file here so we can take a look at it!

... what does Cura say when you open the 3FM-file? Did you create the 3MF-file yourself or did somebody else give it to you? Try opening a STL-file (lots to download Thingiverse)... You don't understand the difference between center and origin... forget the values, start printing... and upload your 3MF-file so we can take a look at it...

You probably haven't made all options visible... there are many many options... Scroll to "Buildplate adhesion"... if you don't see the "prime blob" setting, hoover to the "Buildplate adhesion"-bar and there appears a cogwheel... press the cogwheel and search for "blob"...

You have unchecked the "origin at center"... that is normal for most printers (maybe you want to share what brand/type of printer you have)... hotend will position in the left front corner of the buildplate when heating up... ... when you open a STL-file, where does Cura put the object on the buildplate? In the center? When placed in center, X,Y and Z values will be zero (0)... When you move the object to the left front corner, X and Y values will change... I'm afraid everything is OK and that you're confusing some things. In the future, open the object, choose for save in file... (or press CRTL+S when using windows) and save the 3MF-project file and upload it here... Then we can see what is happening and what your settings are... 1: opened a STL-file, Cura puts it in the center of buildplate... 2: moved object to left front corner...

... I would contact the "seller" of the file, so he can remove the part that should not be there!

You should never hear strange noises... If have to find out what produces the noise and find a solution so it stops doing that! I had a slipping gear on the extruder, that also produces a clicking noise... My extruder tried to push more material through the nozzle than that was possible...