Allan,
I have tried all three scenarios and not once has Dreamweaver crashed. I am on a Windows 10 machine and running build 7884 of Dreamweaver CC2015.
Quite often, there are outside factors that cause Dreamweaver to crash. As an example, when Web Companion, a malware program, has been installed on your machine, Dreamweaver will act up, see OT: Dreamweaver 2015.2 crashing on launch on Windows 10? Read this.
If I were you, I would use MalwareBytes or similar software to seek out all of the nasties that your anti virus program does not find.