"But when I try to install the SR1 I get a message saying that Poser Pro 2010 is not installed on the system."

I have PP10, and I have the SR1 for PP10, and I am really getting the error 'Poser Pro 2010 is not installed on the system'. And 'Not a Poser 2010 folder.'
I have even tried re-installing PP10 in an alternative folder, but I still get the same error message when I try to install SR1.

When I saw this thread, I thought my problem would be solved.

Cannot find the answer on the Smith Micro Knowledge Base. Can anyone help?