Trial CIS Pro demands licence purchase

Hello everyone!
Can somebody experienced here to help me? 20 days ago I have installed CIS Pro trial. It was said 1 year trial. Now it demands licence purchase. If it were my home pc then it wouldn’t be a problem just to reinstall to a CIS Premium, but this is my office pc. Reinstallatian can be really a trouble for me. So is it possible to solve the problem without reinstallation of CIS?

Thank you.

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Please don’t cross post and continue in CIS Pro (new package) free for 1 year!

Justin gave an elaborate explanation there. I will lock this topic.