Visibility Garmin-unit maps in Basecamp

[jrozemanl]

When trying to disable the visibility in Basecamp for maps in a garmin-unit, I encounter the following problem when I follow the next intructions of Catymag:

[Only registered and activated users can see links. ]

"OPTIONS"-tag: Enable advanced options;
"WRITE"-tag: in the option "set version in header", in Ms window, write value '1' in the field.
Then click "Write all" or "Write selected"

All the maps in the garmin-unit were disabled in Basecamp, only the one with a P-record in the .img file are still visible:

[Only registered and activated users can see links. ]

I tried the Join-tab and create a new .img, without succes.
Is there a way to remove this P-record from the img-file ?