Since Voyer was removed, then re-added into the MS app store there have been continuing issues with In App Purchases.
The first issue is that it became no longer possible to make donations (and remove the ad banner). I released a work around for that (ARM and x86 only) 2 days ago, in version 2.4.23, while I wait on MS to fix from their end.
But… I happen to have introduced a different bug; where people who have made a donation are seeing ads return.
I’m very sorry about that! I have it fixed now and am releasing a new version to the store, which also includes a full fix for 64 bit editions (XBOne, for instance).
I think we can see the light at the end of this issue now with this 2.4.24 version heading into the app store.
Thank you for your patience,