I downloaded your software from the SlideME store which is the only store on my Android device (order 15588004528). have just paid to upgrade to your Premium Version but it appears to need Google Store to perform the Upgrade Confirmation! I am now stuck.
if you don’t have Google Play or Google Play Services on your device, you can purchase a premium voucher via the link I posted before. When you acquire the voucher, you can insert it into the app using the voucher option on the top right of the purchase screen.