Quoted from original developer site:
To be able to search the stations and convenience stores, was so also provided search data in a separate file.
I think these two files are for devices only, to make it work in BC you must download files from dropbox link supplied on site and install it with Mapsetoolkit.
Basecamp sometimes doesn't render fine maps built with third-party compilers.
I will make some tests and report back after downloading files.