I'm running DMS 1.1.4 on Wordpress 3.8 and I've purchased and installed the LUD DMS Testimonials.
However, with the plug-in activated the DMS editor no longer works - meaning the page fails to load properly and I get no DMS toolbar.
I've installed this on two different installations and the exact same symptoms occur.
I have Meta Box installed as well (per the instructions) with this activated there are no perceived issues.
I'm pretty disappointed in the fact that I wasted a lot of time trying to fix this.
Hope someone updates and fixes the plug-in - since I now own it....
Let me know if someone fixes it.