07's came out with version 4.50, but this release broke the compression releases. I would not use lower than 4.62, but would tell you to use 4.77 which is the fix for 4.76 if you have it. The reason is if you have a map made and it is with newer software you wont be able to load it or reload it with older software. the other thing to consider was Harley changed some maps after first release with the hot running motors and those changes would be seen in 4.62 and later revisions.
Again I strongly recommend using the latest greatest to reduce the possible number of issues that could be found. The oemconfig file tells you what they changed at a marcro level, but generally does not do so at a code level.
-harry