Thanks for giving that a try. Sorry you are still having trouble.
Spine writes and reads some files from the user directory and also the temp directory. You could try excluding C:\Users\Xxx\Spine from Avast. Unfortunately the temp directory can be in a number of places (thanks Microsoft), in this order:
1) The path specified by the TMP environment variable.
2) The path specified by the TEMP environment variable.
3) The path specified by the USERPROFILE environment variable.
4) The Windows directory.
It's easier to just disable Avast completely and see if Spine runs. If it does, then you can be sure that Avast is wrecking Spine's files. FWIW, Bit Defender and other (terrible) software have been known to delete Spine's files. There's nothing Spine can do about that. 🙁 If disabling Avast doesn't fix the problem, we can look elsewhere for what is going on.
It's a bit strange your log says downloading twice and update complete twice. It appears the launcher hides but doesn't disable the OK button, so if you click the button twice it will start two downloads and then fail to start. We'll fix that in the next release. Can you verify you are clicking the button only once? Pressing enter is also fine.
