brunski In AHP under tools purge delayed macros then Under tools again clear interface.
It sounds like you may have a looping macro so you'll want to check your macros.
Once you have ensured you don't have any looping macros or ones with possible errors be sure the AHP recycle bin is empty and update the interface.
petees In your ProgramData\X10 Settings delete the X10Active.xml file then try starting AHP.
If AHP still fails then do the following:
Make a back up copy of your AHX files from the ActiveHome Pro folder then delete the non working version download and install this one.
once installed you can copy your AHX files back to the ActiveHome pro folder