It seems like this is a great utility which supports many different formats. However, the first thing I noticed when editing a (AVC/DTS) mkv is its very sluggish to move around on the time-line; with my HDD being over-utilized. This happens even on a small 4GB 1080p TV show. Especially when first loading the file into the application. I dont have this type of a performance issue when using another utility called, VideoRedo; which does the same type of lossless editing. Is there something I need to change in the settings in order for it to run faster?