Cura won't open

[AlDee 0]

I think I've confirmed a solution to this problem. I was having a similar issue with Version 4.2.1 on Windows 10. It seemed to install ok, and was stable, but then I tried editing some printer settings, and suddenly the program crashed and would not launch anymore. I tried uninstalling/reinstalling, but no use.

I noticed a few binaries got left behind of the old versions and could not be deleted. Next stop, reboot. Now I was able to remove the files from Program files. Reinstalled, but no good.

 

It wasn't until I read the posts here and someone mentioned the user profile that I looked at C:\Users\YOURUSERID\AppData\Local\cura\4.2\cache\definitions\4.2.1 directory

I found that I could access the files but couldn't read any data. In comparrison, I had a previous 3.2 folder where I could read the files fine in notepad.

So I renamed the cura folders under Appdata\Local, and Appdata\Roaming, and let the program restart.

It worked fine, and let me start fresh.

I don't know why it crashed, or if it will happen again but at least this is better than going through a lengthy uninstall/reinstall

 

 

[AzraelMors 0]

I have been having this issue for roughly the past year now myself. Specifically with Cura Crashing after attempting to make a setting change or clicking the sidebar header at all. After finding this thread I began to systematically remove then add back each file from C:\Users\YOURUSERID\AppData\Roaming\cura\4.2 and found that specifically, at least for me, that the cura.cfg file was the file preventing Cura from opening and not any of the printer specific files. I continued withing my cura.cfg began removing some of the config data and found that once I removed any setting that pertained to the window size, position, or mode and found that to fix my problem. Thought this might be nice to share to help prevent individuals from having to rebuild "corrupt" machine files.