M4TT, the 7.7.1 patch is for when you already have UBB.threads 7.7.1 installed. It patches 7.7.1.
Your first post (and screenshots) said that you were having problems using the upgrader to install 7.7.1. And that you were not yet on 7.7.1.
You need to use the upgrade package to perform the upgrade.
2019-03-02 UPDATE:
[...]
• ubbthreads-7-7-1.zip has been updated within the Member Area
This is a release refresh and is intended to fix any previously reported install issues. If you're having problems with the ubbthreads-7-7-1.zip package you've downloaded prior to 2019-03-02, download this main .zip file again. This release refresh also includes within it the patch mentioned above.
Source
https://www.ubbcentral.com/forums/ubbthreads.php/topics/262141/7-7-1-changelog-discussion
