klwp doesn't work on lineageOS

hi, i installed klwp and paid for the pro key, but when i try to open klwp, i get an error about needing the play store. the play store won't install on lineageOS, but aurora store works fine and let me install the APK. what can i do? no way am i installing the ad riddled version after having already paid for the full app

btw this isnt a universal issue with paid apps on lineageOS, nova launcher prime works the same way as klwp (main app then a second paid app that unlocks paid features in the main app) and doesnt have any problems unlocking the paid features