For the record (and for future memory) the development of grub4dos has moved several times.
At the time unfortunately the sourceforge access was lost exactly at a time when the latest version (2009-03-31) was (particularly) buggy, development continued on nufans.net (also dead now) and latest and ONLY "supported" version of the 0.4.4 series is the one I pointed to (and NO ONE ELSE).
Development has continued and it is still ongoing on one of the current developers/maintainer sites, here:
Reboot.pro remains the unofficially official "western" support board.
 On Chenall's site there are a few later versions of the 0.4.4 series, that may be good as well, BUT that - unlike the 2009-10-16 version, have not been used extensively as soon various versions of the 0.4.5 became in common use.
As hinted before, IMNSHO the OLDest version that works properly on a given hardware and has the features you need should be chosen, whilst if you want to experiment with some of the new, powerful features of later versions you can try both latest of the 0.4.5c series or a not-latest-latest version of the 0.4.6a series (which being the "experimental" branch may - in this or that version - introduce a bug, either a new one or a re-introduced one).
Of course *any* version, as long as it works on your specific hardware and does what you *need* to do is fine anyway.