Activation! Help! Upd. Huray! It's alive!

So, I uninstall previews version of DVR Studio and delete all BMD folders from Program Files and Program Data, after that, I install new beta (8) and now DVR don't accept my key... What should I do?

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UPD. And version 16 too. Need help!

UPD. And 15 too. What should I do???

UPD. As I suspect

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But, I use this key only on this workstation, but have reinstall Windows some months ago. Where I can saw all device and can make license management now? Somebody help!

UPD. It's ALIVE!!!

They seem to have a problem with their license servers. Do what they write: contact support.
The more complaints, the faster they may get their act together.

They seem to have a problem with their license servers. Do what they write: contact support.
The more complaints, the faster they may get their act together.

And here, unfortunately, it is not so easy to get and write to support. I wrote, in response I received a long letter with instructions and here's how to get help, I'm not sure I got it right. I don't speak English very well.