I bought the game+expansions but am unable to find the serial for Entrenchment expansion, so playing anything other than vanilla is lost. When i try to update it says "game not registered"-try to register(again)-"serial is registered to another account"(probly my old account that got hacked). I want to play with mods but I can't update the game either...
I don't know how it is possible to buy the expansions individually and not have Entrenchment registered. I would contact support and make sure you are logged in to the right account (a lot of people somehow manage to make two accounts have different Sins serials on them).
Creating the 'mods' directory manually doesn't work, since the enable "mods" doesn't show in the menu- ideas?
If you have at least original Sins 1.05, going to the mods tab and hitting "Show mod path" should create the mod folder.