Hi!
Stop cqrlog. Use your favorite text editor (here I have used command line editor "nano"). You can also use file browser to navigate that folder and right click sat_name.tab and select text editor from there. Note that file browser settings must allow to "show hidden files and folders" as ".config" is a hidden folder.

nano ~/.config/cqrlog/sat_name.tab

Should look like this:

AO-10|AMSAT-OSCAR 10
AO-13|AMSAT-OSCAR 13
AO-16|AMSAT-OSCAR 16
....

Add your satellites to top of file and they are first when you use selector at cqrlog.
Satellite name and description is separated with "|" (pipe).

Save file and start cqrlog.