Regarding the 'Named Trails' search problem in BaseCamp:
It took me a while to figure things out (as I have said before, I am not an expert).
Fortunately, there are much more knowledgeable (and helpful) members on this board.
They found a solution for the 'Named Trails' search problem (with some maps) in BaseCamp much faster (and a better one than I could have found).
Many thanks to pietu (who put in a lot of work to help me), and to all the others who have contributed (in alphabetical order here): Ballebar, bam-bam, catymag, james222, jonnywi, Mapperoni, merlinboy, Rossi4S, sherco40, syzygy.
From my point of view (please correct me if I'm wrong), the preferred sequence of processing an original locked IMG file is:
1. Remove personal data from the original IMG file with pietu's tool.
2. Add the lost product number to the file header with sherco40's ImgTool.
3. Unlock with Wu Yongheng's gimgunlock.
(All these great tools are in the Software & Tools section.)