I hear about problems with opening DAT files but I don’t know how big a problem it is. I have written a small program that associates whatever program your system uses to open TXT files with DAT files. If anybody wants such a program I may add it to the library site or I could add a set of instructions for changing the file association. I know sometimes other programs use the DAT file extension for their own use so opening a DAT file can either show rubbish or at least text that is not in the desired format.
There must be some more exiting or at least more relevant to human powered flight to write about!