I just used the live update and that completed with success and the program is working as it should. File associations and context menu integration. I got lots of pop-ups during the live update/install from my firewall for changes (I have it set on high sensitivity); having initiated the live update from the PDF reader just before the end of the installation it said I had to close PFF-XChange (which I did).
I never allow PDF browser integration, the last thing I want to do is open a PDF file within the browser, I download and view off-line.