Yes. The problem is that the Git Windows installer has an option of updating the PATH, but the default is not to update it. Using Git Bash doesn't require the PATH to be updated. So that is why it wasn't included in mine prior to now.

It looks like the original egit logic set the gitprefix variable based on the folder you manually selected via the Browse button. As jgit removed the variable, egit had to remove the Browse option, ie. the ability to manually select the path. So that now forces Windows/Eclipse Mars/Egit users to include it in their PATH variable.