Since N++ released v7 and now offers 64bit version then i think it would be good to have PM show wich plugins have 64bit versions available. In the near future...
At the moment i imagine the list of 64bit plugins is very short.

Im using 32bit N++ so i cant check at the moment if 64bit N++ already incorporates 64bit PM that has this functionality. If so you may dismiss what i wrote above.