I compiled a test build of the PowerTools 2014, you can download it from:
http://www.macecraft.com/downloads/betas/jv16PT2014_test1.exe
This version is special because it will output so called profile files, which allow us to analyze exactly what parts of the program take time to run.
So, if you are experiencing the problem of the Software Uninstaller or the Registry Cleaner being extremely slow, please download and install this version (you can install it over PT 2014), run it, and send all the generated profileX.txt files (zip first) to this thread. The Profile text files do not contain any information that could compromise your privacy.