Problem With Album Washer/ In-App Purchase

[CranberryTimes]

I have already contacted the Google Play-Store-Support on this matter, but unfortunately, they can't help.

A few months ago I have purchased the Winamp Pro Bundle and the Winamp Album Washer via in-app-purchase.
Then, I got a new phone and wanted to install my license of Winamp on it.
At first, I could neither install the Pro Bundle nor the Album Washer, without being asked to pay again.
With the help of the Google-Support, I have managed to be able to use at least the Winamp Pro Bundle again.
I did this by uninstalling my free verion of Winamp, clearing the play-store cache and data, restarting my phone and installing the free Version of Winamp again.
Afterwards, I could you use the Pro Bundle via the store integrated in the Winamp app.

What I am still missing is the Album Washer.
When I access the Store via the Winamp App installed on my phone, it displays the Winamp Pro Bundle as successfully installed, but when I click on the album Washer, I am asked to make the purchase again.

Could you please help me fix this?

Thanks in advance!