Trouble with upgrading to 8 from 7.5

I purchased the upgrade to Cubase 8 Pro form 7.5 but I’m getting an error each time I attempt to install. The window tells me "Unable to fine file “Start_Center_Cubase_Pro_8”! I’ve upgraded many times before and have never hit this wall before. Any help would be so appreciated!
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Sorry if this is a stupid question but have you unzipped the files before trying to start installation?

I believe so because I can see all the files. if you suspect I’m missing something let me know. Thanks!

User error! I was extracting the files but trying to install from the wrong folder. Duh! 8 is up and running now. Thanks for your help!