Then it would be in two places, both your downloads directory (I assume that’s where you ran it from originally) and the Applications folder where the AppManager has “installed” it.
If you want to backup a copy of it just go to the Applications folder and copy it from there.
If you use AppImageLauncher it’ll delete the file after you open it and press “Integrate and run”. They’ll be moved to
~/home/user/Applications/It there a setting for AppImageLauncher to not delete the file
Then it would be in two places, both your downloads directory (I assume that’s where you ran it from originally) and the Applications folder where the AppManager has “installed” it.
If you want to backup a copy of it just go to the Applications folder and copy it from there.