[Ultimaker Cura 4.7 is available!]

I cannot edit the post, but the solution to the problem with the missing profiles is on Github:

 

https://github.com/Ultimaker/Cura/issues/8229

[Ultimaker Cura 4.7 is available!]

Well, there seem to be multiple issues here. I loaded the update on a laptop that's never had the software installed and it loaded the STL. However when I created my own filament profile, all of the print profiles disappeared and it won't actually let me import or create one. Even the default profiles are gone.

 

 

[Ultimaker Cura 4.7 is available!]

Quote

In cura if you do "helpl" "Show Configuration Folder" and then you delete that folder tree and restart cura it will recreate a fresh copy of default profiles in there and Cura won't crash anymore.

 

Unfortunately that didn't work for me, it still crashes every time I try to open an STL. I completely deleted the cura folder in appdata as well as fully reinstalled cura. I'm unable to open any STLs at all without it crashing.