.....can't install a component after i did a backup with akeeba. I think the problem here is that the component.....wasn't installed on the backup file from which i recovered.
That shouldn't affect the ability to install extensions.
Did you restore the site "over the top" of the existing site? To restore with Akeeba Kickstart, you need to have an empty folder, and only upload the JPA file and kickstart.php. It would also be advisable to use a clean database, or at very least a different table prefix which you can specify in the restoration script (Kickstart).
But....are you saying it won't install after the backup
, or after the site restoration
with Akeeba (Kickstart)?
I can't see the connection between simply having done a backup, and inability to install extensions. Akeeba Kickstart should restore an exact replica, working copy of your site that you had backed up. If the component wasn't installed at the time of your backup, then there shouldn't be any issue installing it to the restored site.
Your database wouldn't (and shouldn't) have a prefix of "jos_" so whatever you have referenced (in terms of the instructions you mentioned) is old information.
Yes, you need to look for the relevant SQL tables for phocamaps, but they will have the table prefix used when you installed Joomla 3.x not specifically "jos_". The table prefix "jos_" hasn't been used since Joomla 2.5
I would suggest contacting Phoca for help with this issue. https://www.phoca.cz/forum/viewforum.php?f=38
(although I still don't know if it's a Joomla issue or simply with the extension in question)