If you open Command Prompt and run the following command, it will show what versions are deemed installed:
reg query HKLM\SOFTWARE\WOW6432Node\Toontrack /v SDIVersion /S
If you open Command Prompt and run the following command, it will show what versions are deemed installed:
reg query HKLM\SOFTWARE\WOW6432Node\Toontrack /v SDIVersion /S