From some brief research it appears this is a hacked version of Action Replay 4.2 Pro. According to the Action Replay wiki this doesn't seem unusual:

"There are several sub-versions of the english 5.2, but they strangely enough appear to be changes from the 4.2 versions without the major code update which happened towards the official 5.0 version. This seems to be partly caused by incorrect or confusing numbering from Toolkit and fastload version numbers."