[Q] play store purchases gone after CM12 install? topic

i have a nexus 4,just went to install CM12 nightly for it (from official cyanogenmod page). after a few color inversion problems and some elbow grease,i went to the play store to download my games again. they were still in the "My Apps" section but i had to purchase them again... couldn't use anything else but paypal either (it's empty now so i can't use it).
i've never modded any of these apps with freedom or anything. help pls?

in advance,i'm not sure if this is the right forum or anything,'cause first post. thanks.