Help with CIS please

First, I was stupid and do not remember what paid version I had ;D

I tried the update and got all the reported errors. I have gone through, tried to use Revo but alas the update removed what I had and did not install. I updated the windows installer. nothing.

I have now used the Clean-up tool, still cannot download CIS.

Lastly, how the heck do I find out my license key now that its all gone :cry: