Mh this is handled by the Dropbox SDK.
I think the token is saved into the Keychain as com.hegenberg.BetterTouchTool.dropbox.authv2, if that happens again, could you check if that key is still there in your Keychain?
Possibly try the latest alpha, I have updated to a newer version of the Dropbox SDK there. Maybe they have fixed the issue (although I have never encountered this myself).
Usually it's some sort of file permission error if that happens.
I'd try to delete this file while BTT is quit: ~/Library/Preferences/com.hegenberg.BetterTouchTool.plist (create a backup of it first)
Also try to delete com.hegenberg.BetterTouchTool.dropbox.authv2 manually from the Keychain app.
Are you using an official BTT version downloaded from https://folivora.ai? (Otherwise the code signature will not match and things like this can occur)
If t here is no entry in Keychain, that would explain the issue. But I have no idea why the Dropbox SDK wouldn't be able to write to your Keychain :-/ Do you have any special config there?
Oh, the keychain entry for com.hegenberg.BetterTouchTool.dropbox.authv2 has actually just appeared after I deleted some redundant presets (see my other post in the thread about BTT preventing screensaver). I wonder if there was a corrupt preset related to both issues. I have backups I could send if you're interested.
Anyway I'll let you know if the Dropbox API Requests keep happening.
I assume there is some unknown exception when BTT tries to sync. That's the only reason an access token reset could happen. Maybe go to the about tab in BTT and click the "Export Debug Information" button right after this happens, this will create a folder called BetterTouchToolDebug on your Desktop that you can send to me.
The sync feature is still very experimental (although it's actively used on 8000 computers per day already)
One more thing to try would be to delete the cloud data (this could resolve some deeper sync conflicts):
This has picked up for me again just over the last few days. It would ask as though in a loop sometimes (many consecutive requests w/o any interaction)
Don't use the Dropbox sync, especially if you encounter issues. It was highly experimental and I have decided to replace it with something better (but no ETA on that yet)