Before you uninstall your software, go in help and note down the 'Serial Number' for the Factorytalk View Studio software you have.
The download page you are on is for Factorytalk View Site Edition, not studio.
Once you have that serial number, go here:
https://compatibility.rockwellautomation.com/Pages/Home.aspx and enter that with your activation code/company name etc. This info should be in your license.
Thanks!
-PreLC