I had the trial for Presenter 10. It worked fine on my laptop Windows 8.1 Powerpoint 2013 32 bit system. After I bought it, I had to use live support to get a workaround to get it installed and working. Nowit's a few hours later. At first it showed up and worked fine. Then I closed the PPT program, re-opened and it won't work. I go to options to look at the status. First it says "inactive" so I make it active again. It still doesn't show even though it is listed as (the only) an active add-in. What the heck? I need this to work. Too late for support chat and I work tomorrow.