Open Source Document Management System | OpenKM

Dears,
i have installed OpenKM on windows 8.1 version 6.4.14 and i want to activate the Autocad preview i have installed Acme CAD Converter and modified the "system.dwg2dxf = C:\Program Files (x86)\Acme CAD Converter: settings but i am having the thumbnial without the the preview.
any advise is highly appreciated

one more thing i can see from the online Demo that they use version 6.4.18 where can i find it?

Each month we do one or two releases ( this is our normal programming cycle. In new version we include features and we solve bugs ). We do not make a trial each month, normally when we consider is relevant doing it, because solve relevant problems unknown when we released ( actually is not the case ) or because there're significant new features. That's why we do not have 6.4.18 trial at the present.

If you are on trouble testing trial, my suggestion is contact with us ( http://www.openkm.com/en/contact.html ) and our sales & marketing guys can share to you some online demo for limited period ( full installed ). Probably for some kind of testing will be better than break your head trying to install it ( that's always hard task at the begining )