Older versions of BC defaulted to using "Crawler.sqlite" as the main database file. As of version 6.0, BC uses a file that starts with a date/timestamp and ends in bcs (for example, 20140623191316.bcs). You should be able to figure out what your main database file is by looking at the size and timestamp for the file.
You can see which data file you are loading from within the BC app. Go to Settings -> DB to see which is your current file. It will also give you statistics on any other data file listed on your device and allow you the ability to load one of the alternate data files.