Valid license for Parallels16 - unwanted ad for Parallels17 on every startup

Hi

As a Parallels customer I purchased Parallels16.
Each time I open Parallels16, a popup "reminder" to update to Parallels17 appears. See attachement.
So of course, I clicked it and updated the version. But thereafter I am presented with the fact, that my license is valid only for Parallels16. So I had to downgrade again.

I guess, it's a "great marketing move" but it's annoying and costs me time and data and creates frustration.
Why do you inform about an update that factually incurs - previously hidden - additional costs? Why can't I remove this reminder?

So, to sum up: I have bought this product. I see an annoying banner each time I login that informs me about an hidden cost update.

How can I set that this upselling advertisement doesn't appear anymore? I haven't found a "don't show me later" checkbox, yet.

Thank you for your help!