Hi Marc,

> The Mac version used a lot of energy in V3, maybe concentrating on
> new features for this version and 64bit on V5 would be a good idea?

It's sort of tempting to do that, but the larger and more complex the code base gets it then gets more difficult to do a large overall switch, so going that route just kind of makes the 64-bit transition all the more difficult later on...

- Michael