Yes, the first thing is a C++ problem with the exec command, exec executes a program in the instance, exec was called. That means DDE v2 becomes A6. (Very simple explenation). It is possible to execute DDE v2, after the preview comes to the end. Perhaps I'll add this in the next patch to v.2.1.2.

That's the next point, yesterday I finished the patch v.2.1, it fixes all bugs you reported. And it adds two new features.

1. an autosave function
2. now you can search the A6 path

A sample level and a better help center are in development.

If you wish I can give you the patch v.2.1 today or the patch v.2.1.2 at the end of the week.