You have misconfigured entries in your windows registry. When our installer see such a condition, it stops until it's resolved by the user in terms of ensuring that no path conflicts exist in terms of where your simulator products are actually installed versus where your Window registry think the product(s) are installed.
Use our C:\Program Files (x86)\Mindstar\Tools\SimSupporter.exe tool to resolve the conflict. The SimSupporter give you the ability to either correct or disable a path so that the production installation can proceed. After installing our product, you can use SimSupporter to re-enable the path that you disabled.