I'm having the same problem. Other apps update in Obtainium fine, this one doesn't. No error, no "not installed", it downloads, installer launches, click install, get a toast from Obtainium that says "apps updated" and it's still not updated. That's what youre seeing?
Discussion
That's what its doing for me, I go to update, but it just stays as version .1. I've tried completely removing it but it just reverts to .1. I know Obtainium is very specific on how you number releases, so I don't know if it being numbered "0.1" and the next being numbered "v0.2.0" is causing the issue.