I'm now using MEP for several years (now edition 2014)

years before I did us another program (can't remember the name)

when rendering was done (let's say took about 1hour) and I changed a little piece in the movie only that little was re-rendered again , so it only took 5 minutes to re-render the whole movie

In MEP it seems the program is always re-rendering the whome movie again ?

kind regards