Quote Originally Posted by parsifal View Post
But there were no DLL versions of the libraries to be found inside the secondary Qt installation's directory (such as those inside the \bin subdirectory of the SDK installation). Only the static .a versions inside \lib.
That's good. It's exactly what should be there. DLL files are dynamic libraries and you want static ones.

Quote Originally Posted by parsifal View Post
I tried again to make Qt Creator recognize the second Qt version/installation.
What does qmake -v return when ran from the default (non-Qt) command prompt?

The new installation was recognized, but only because it was in the PATH variable, not because I manually added it there.
And when you add it there then it is not recognized?

But, what if someone would like to use more than two Qt installations? I don't think that multiple batch file configurations is what the Trolls had in mind when designing the Qt Versions feature of Qt Creator!
The question is a bit pointless as Trolls didn't indend it to be dependant on the PATH contents. You must have done something wrong.