Well, I have confirmed that:
1. As far as Play is concerned, the version on the Play server is the same as the version that I've had for many weeks, so won't update it. If, indeed, the Play server version is different (and the software doesn't appear to have a feature like 'Report Version Number", so it's anyone's guess whether they are the same or different), then whoever at InnoGames who manages the upload to the Play servers has failed.
2. The store description doesn't mention "Beta" at all.
3. The app's icon has the word BETA written over the pic of the bearded knight.
Kawoni, it might be an idea to actually do some testing.