Reinstall on older android version

I just reinstall a fresh nexus 7 with android stock 4.4.4. Of course, I’m not able to install Yatse from play store (not on android 5.0+). I download apk version 8.9.0 on apkmirror and it works but I’m not able to get back my licence for the pro version (unlock with google play 3 years ago). When I click on buy now in Yatse, a message tell me the I already paid for that.

How I can get back my licence ?

Thanks

If it tells you that you already have paid then the licence should restore.

Yatse licenses issues solutions probably have your solution and in all case as the template says I need logs.