Regedit has two locations for Unity keys?

I'm finding it a bit frustrating testing different versions of PC builds for the same game. I just discovered that registry keys are not only located under HKEY_CURRENT_USER\SOFTWARE\Unity\UnityEditor\CompanyName\ProjectName but also under HKEY_CURRENT_USER\SOFTWARE\CompanyName\ProjectName. I had deleted all keys under the first path above, but I'm wondering if I can delete all of the keys under the second path. It appears to have more keys to delete. If I delete the keys under the second path, am I altering anything important that would interfere with the Unity Editor rather than just the PC game builds? Thanks!