Hi, I made a mistake in my post. When I try to load the Zorro EA (not the ZorroMT42.dll) on the MT4 chart I get this error message.
Now I think I maybe only should change things on the Zorro side: setup the two different accounts with two different dll names in the accounts.csv (which I already did) and make two entries in the Zorro plugin Folder for the two dll's.
What I now did was also change the dll name in the MT4 library and that gives the error that the Zorro EA can't find the dll anymore.

So I wil now try to only have two dll's in the Zorro Plugin Folder and in the accounts.csv and on the MT4 side I will not rename anything. Hope that works.
Thanks for your reply.