Your comments
Does your repository contain a .gitflow file in the root directory as stated in https://docs.syntevo.com/SmartGit/Latest/Git-Flow.html#git-flow-commands?
You have 2 options:
- use Reset Advanced or
- set the low-level property reset.default
Have you tried SmartGit 22.1 preview?
If you hide the Output view, an output dialog will be shown if the command failed. There you can select text easier.
Maybe the below external tool might help you a little bit?

The latest build allows to open/edit files (depending on the platform).
In the next 22.1 preview build, please set spellchecker.checkWordAtCaret to true. I've verified with LibreOffice, that also does not check the word at the caret, even not after a short time.
Customer support service by UserEcho
If you mean the .deb file: this is not necessary, because installing the .deb file will create a menu item automatically.