After my update to 2015.4 for Lightroom, Lightroom will not export to Photomatix Pro plugin. I haven't tried any other plug ins yet so I don't know if its isolated or not. Ive looked at the Plugin manager. Everything seems to be ok on the settings, it just wont export. Also my mouse quit scrolling left to right in Lightroom in Library mode. I have a 27 inch Imac. Seems every time Adobe comes out with an update there is something wrong with it.
I have read that there is a fix on the Photomatix web site.
Thanks dj_paige, that fixed it.