First of all, my name is Michael, using callsign EUA197.
I also had stress to get working EFB together with FSrealWX Pro.
Today i found perhaps the solution and i hope that i can help many users also.
The problem itself is produced not by EFB but by FSrealWX Pro.
If you go to => Options => General you see the path to Export Metar File.
If you put the path with the option "Open Folder" and then "OK" you see the following path, which will not work:
C:/Program Files (x86)/FSrealWX_Pro/storedWX.
This is wrong and will not be accepted from EFB !
The reason is the wrong slash /.
So put in manually the path c:\Program Files (x86)\FSrealWX_Pro\storedWX and file ".wx"
This will work for me.
