From the doc: 'This program, in conjunction with the Configuration maker included, will turn off the time-limited demo of MOST programs. For example, Netscape Navigator 2.0 beta 2 had expired on Dec. 12, 1995. This program, When run instead of Netscape (From Netscape's Directory), will change the date to a date specified in the CRACK.DAT file in the same directory, and will then run Netscape. Then it will change the date back to the current date, removing the time-limit!'
crackcfg.exedatecrck.exe