Pro version

hello, I'm having problems with the pro version of kwgt, I bought kwgt pro on the playstore some time ago and everything worked fine until a few months ago when I updated my device. I have a custom rom installed where the playstore says that kwgt is not compatible (if I can download the purchase), I downloaded kwgt from the apk mirror, it tells me that it is pro, I can export my widgets but it shows me advertisements. any solution? Thanks in advance