Repo installed from zip not in list

I have installed some repos, but I do not see them in the list when I try to install an add-on from repo

I’ve installed eg ' from ZIP, OSMC says install was successfull.

But then when I try to install from repo, I don’t see Plexbmc in the list.

What am I doing wrong?

I see this in my logfiles

11:50:27.079 T:897577968   ERROR: SQL: [Addons27.db] The database disk image is malformed
                                        Query: DELETE FROM installed WHERE addonID=''


Looks Addons27.db is corrupted, could be sd card corruption; so you may need to do a complete reinstall and restore from backup. before that you could try from the command line:

rm /home/osmc/.kodi/userdata/Database/Addons27.db

Restart kodi, the database should rebuild on startup; and try adding the repository again.

Thanks Tom.