Hi xmoatz!
Thank you for the bug reports!
We released Texture Tools Exporter 2023.1.0 today, which adds backups and restoration (point 1)! When you overwrite a file, we’ll now try to create a backup in the Windows temp directory, %LocalAppData%\Temp, and restore it if you exit the plugin window without saving.
Good work finding the bug in point 2! I think the logic we have for determining cube map availability looks at the value of the field without considering whether it’ll be applied. I haven’t seen bug 3 yet, but I think I know why it happens - I’ll send you an update here when we have bugs 2 and 3 fixed.
Thanks!