Unable to uninstall SAPDB SQL Studio 7.4

I am trying to uninstall Studio 7.4 so I can install the latest version.

I keep get the following errror:

Error: Register of " failed (-1)

I then click OK and I get the following error:

Error Number 0X80040702

Description: Failed to load dll: SQLStudioDSQL

Set up will now terminate

I tried to manually uninstall the product but I believe I am still missing a registry key or something.

I also tried to do an upgrade to 7.6 but it tries to uninstall before I upgrade.

Is there any I can do to remove this version?