Parallels (activated) stopped working and demanded again activation

I translate this post via Google translator (sorry for the grammar)

I updated my Parallels 9 on the last update, what would it work on os x yosemite.
After that, it did not start for a long time, but today launched Parallels and demanded my activation. And my key she does not want to accept. What is the problem? Why and who needs another activation if everything is working?

Where can I find Russian language support?

 

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