Upgrade issues (2.4)
 

upgrade.php (2.4):

1.0 -> 1.1 Upgrade from PhotoPost Classifieds 1.0 -> 1.1
1.1 -> 1.8 Upgrade from PhotoPost Classifieds 1.1 -> 1.8
1.8 -> 2.0 Upgrade from PhotoPost Classifieds 1.8 -> 2.0
2.0x -> 2.11 Upgrade from PhotoPost Classifieds 2.0x -> 2.1
2.3 -> 2.41 Upgrade from PhotoPost Classifieds 2.3 -> 2.4
Import Zip Codes Import the Zip Code database

What do you do when you have 2.2? ... I guess you run 2.3 -> 2.41 since there were no database (or ....?) upgrades between 2.11-2.3

Well then.. when you run that 2.3-> you'll get:
Preparing to update 2.3 database...

Warning: unlink(login-inc.php): No such file or directory in upgrade.php on line 537

Warning: unlink(adm-cinc.php): No such file or directory in upgrade.php on line 539

Warning: unlink(adm-phpi.php): No such file or directory in upgrade.php on line 545

Warning: unlink(adm-purge.php): No such file or directory in upgrade.php on line 546

Warning: unlink(adm-cfgtpl.php): No such file or directory in upgrade.php on line 548

Warning: unlink(adm-cfgedit.php): No such file or directory in upgrade.php on line 549

Upgrade complete! You can now remove the upgrade.php script.

I guess these are not important warnings because "unlink" means that those files that the script is trying to delete are not there anyways.

exactly it means you dont have permission to delete them no biggy just delete them

If you have 2.2 yes run the 2.3 to 2.4 as there where no sql changes between 2.2 to 2.3