1.12.3 is indeed the last TotalFinder version for macOS 10.14 Mojave.
I can’t say I’ve been able to reproduce the issues you’ve described (and I was daily driving macOS 10.14.6 18G9323 for the longest time until I was forced to move off of it due to security updates no longer being released), but I will help you look into this further after I am done with finishing up a new update to TotalFinder for macOS 13.
(Basically, I’m replying here just to let you know that I have seen your post and will get back to you when I have the time to do so.)
That being said, I’m also pretty confident that BetterTouchTool is not the culprit, as that’s also something I daily drove back on Mojave (and still use to this day on Monterey).
In the meantime, it would be helpful to know some details about your system.
- What macOS version are you running specifically? Is it macOS 10.14.6 18G9323 Mojave (latest released version with Security Update 2021-005 installed)?
- What hardware are you running it on?
- Have you tried using the “Reset TotalFinder to defaults” button? (I know you mentioned that you’ve “nuked all TF files”, but did you perform this exact step specifically?)