Hi, what version of OS are you running?
I use ver 8.1 snagit 2018 and I don't get that happening.
Occasionally it prompts me to upgrade which at first site makes you think it's free but of course we know that is never going to happen.
Sounds like it's missing a switch to say load quite in the registry? But just guessing there.
Other place to look see if it is in your startup folder I don't think it needs to be in there.
Not at my computer atm having a break but I'll check when I'm back.
I normally have One Click set to run at start up.Changed the setting to "Capture Window" Restarted my computer and SnagIt was minimized to system tray. Then, I shut down the computer 100%. Restarted, same result. This was with SnagIt 2019.1.1
I would run a repair install.That should reset any errant registry settings back to where they should be.
Or repair whatever has created this issue for you. It's not 100% iron clad solution. But it's pretty close.
It's my favorite go to move. When a program goes wonky and needs some resetting I can't control.