Dave Hill designs has released 64 and 32 bit AAX versions of his beloved plug-in. Dave writes.
At this time the 32 and 64 bit versions are not combined into one binary
To install both
After you install the 64 bit version rename it to something like RA_64, so it has a different name from the 32 bit version, then install the 32 bit version
This will allow both versions to be on the system at the same time