i got it to work - white list emarker.co.uk in smoothwall - and for app blocker, set it up as publisher like this e-Marker2®-e2-p-005, version 16.0.0.0 and above, in "", from O=DRS DATA SERVICES LIMITED, L=MILTON KEYNES, C=GB
after in publisher tab publisher name is O=DRS DATA SERVICES LIMITED, L=MILTON KEYNES, C=GB (this should be all filled in)
under the product name, file name and file version just put a star in the box* as soon as i did this it started working. It may need a manual install but at least all users can run it once its installed
Let me know how you get on