The installation you did sounds fine.
If it weren't, the editor would crash instantly on load.
This sounds more like your pc has trouble with the amount of data. What are your pc specs? (specifically your RAM).
The dump files can be opened with a programming environment such as Visual Studio, but I would suggest just packaging them and sending them to me with a description of when the crash occurred and we should be able to take a look at them. There's also a log.txt file that is easily readable with a text editor and might also have some information. (All these files are located in the installation folder. Default for Steam that would be C:\Program Files (x86)\Steam\steamapps\common\The Divinity Engine 2)
