I also found the same issue with R-3.2.4revised-win. It works with 3.2.2 and I just tested with 3.2.5 (released 14/04/16) and it also works fine.
I noticed that the version string of R-3.2.4revised-win is "3.2.4 Revised" and I wonder if this is why RDotNet cannot detect it, because the string is not in the standard "x.y.z" format? Just a guess but seems possible since 3.2.3 and 3.2.5 both work.
I noticed that the version string of R-3.2.4revised-win is "3.2.4 Revised" and I wonder if this is why RDotNet cannot detect it, because the string is not in the standard "x.y.z" format? Just a guess but seems possible since 3.2.3 and 3.2.5 both work.