v5.05pre2 - October 5 2015

At a project over 5~7GB memory usage, UNDO (Ctrl-Z) function in midi editor after changing note length edit, controller lane event, and TPC track envelopes sometimes failed to response. (the previous step is not changed to last action) Some MCDSP VST3 effects are used. I don't remember similar bug happened in v5.04. V5.05pre2 x64, Windows7 x64.