is this 'official' cat software?
judging from the link you provided it is NOT the official CAT software.
Last time i checked CAT does not offer any of their software for free much less to the public. And last time i checked the 'official' cat branded software for the P5000 forklifts was called Diagnozer and that software cannot be obtained anywhere officially except from them in their training classes or through a special agreement if one is made to select 'fleet' customers. This also applies to the cables required to connect to the machines.