During my test with the new version of Greenshot 18.104.22.168, I encountered a little issue during the installation process.
To resume, if Greenshot is actually running on the machine even if the user don't use it, the update process will fail (Error: Installation job encountered some failures. Error = 0x80240022.)
If I completely close Greenshot, update will be ok.
Do you have a solution or a workaround for this problem ?