No hard feelings here! I can imagine it's super annoying to be blocked by an antivirus out of your control. We also feel helpless about it.
The Spine launcher never auto updates itself. It downloads an update file depending on the version of the editor you want to run. Very rarely the launcher needs to be updated to be able to run a newer editor version, in which case it will let you know you need to download the latest and reinstall, but it won't update itself.
We've always used a license.rtf file, in every Spine launcher build for 10 years, so I don't think an old build would help. I think only recently it was declared by Microsoft or someone that all RTF files are unsafe, leading to this problem. We have very little insight into antivirus malfunctions though, so this is only a guess. This has also happened multiple times in the past for really no apparent reason. Antivirus is a literal guessing game: it looks at software and guesses if it's a virus. When it's wrong, this happens.
We'll see about expediting a build that has the license as a PDF.
