Your post was stuck in moderation for the past several months. We didn’t see it because the forum thought it was spam. Sorry about that. It’s possible you’re seeing ‘Remote Command Exit Code -1’ for some reason that has nothing to do with your PsExec settings, though I can’t say for sure. In any case, you can see the -r setting config under ‘Tools > Settings > Remote Execution’. I would suggest in that GUI you tick the box for “Use psexec.exe custom filepath”, and then set that location to point to the actual location of your copy of the latest version of psexec.
This posting outlines the cause and resolution for ‘Exit Code: 1’ when uninstalling individual updates. Note, you mentioned -1, not 1, so this may not apply to your situation, since -1 is definitely not the same as 1.
https://batchpatch.com/when-uninstall-individual-update-windows-10-2016-in-batchpatch-fails-to-remove-an-update