I downloaded 2 x the locked versions for mapinstall from post 1 (Monterra) and also 1x the 8 files from Pietu from post 2.
In all cases I got the same error as shown in post 14; moving the MDR folder into the main directory did solve the problem and
I could install the locked version for Mapsource.
Unlocking went fine with the Jetmouse keygenerator and allows the Europe CN 2014.40 NT to be seen without problems in Mapsource and in Basecamp.

But that's not the real problem
When I try to select the regions in Mapsource for transfer to my Garmin unit, I immediately get and an error, and Mapsource gets stuck; only an taskmanager instruction to end the program helps.

Using the latest patched version of Mapinstall (4.04) does not show the map in Mapinstall; although I can see older installed maps.

Reading through [Only registered and activated users can see links. ] and specific post 29 from Pietu:
I re-installed Mapinstall and replaced the Mapinstall.exe with the patched exe file .
I did add all unlock codes of my maps in an ucx-file and placed them in the folder where the maps are located (c:\ProgramData\Garmin\Maps) but did does not work either.

What Am I doing wrong, or did Garmin plug the holes in their software so we can not use the old tricks anymore?