Ah the dangers of Google translate and synonyms. You got the wrong definition for right when translating to Irish, the one you have means correct, deis is the word for right (direction). Clé is left, the h appears in certain contexts for grammatical reasons.

You only have to pay for this mod once.

An artist isn’t going to continue making modifications to a painting once you’ve bought it, not unless you pay them to do so. Presuming they aren’t feeling generous with their time.