When real app is also installed, ThinApp5 package won't run.

Here's the simple lashup:

1. Real installed Winzip 14 on the 32-bit machine.

2. ThinApp 4'd WinZip 14 - Runs side by side. No problem.

3. ThinApp 5'd WinZip 14 - I geta message "Unable to install over the MSI version of the installation. Please obtain the MSI version or uninstall WinZip first."

I'm sure there's some switch I incorrectly chose at packaging time.

What did I do wrong / how can I fix it?

Thanks in advance.