A new version of the popular Windows LDraw editor MLCad has been released. This version 3.40 fixes a few bugs and adds some new features. The main new feature is that the long awaited Undo function now works. The other big change is that the part group definitions and favorites are no longer stored in a file, but are now written to the Windows registry.
You can read all about it here
and also download
If you already have MLCad 3.30 installed, just replace the mlcad.exe and mlcad.dll with the files in the zip.
Starting MLCad 3.40 for the first time will put your part group definitions and favorites in the registry. After closing MLCad, you could delete the files MLCad.grp and MLC_Favorites.txt. However it is recommended that you backup these files first.