how to rename applications in "show apps", such as "GNU Image Manipulation Program" to "GIMP" 20.04.2?
Solution 1:
cp /usr/share/applications/program-name.desktop $HOME/.local/share/applications/
Open the copied file, search for string name and change the name there.
Solution 2:
With the little tool alacarte
("Main Menu"), you can edit the launchers:
You need to install it first:
sudo apt install alacarte