The last version is the 2.2.0, released on september, but the new memory manager is in the trunk 2.3.x and there isn't a snapshot yet (I hope to release it next week-end, when I'll get some spare free time). However you can grab the daily source snapshot (24 megs) and try to recompile it. In the case, I can help in this task, so let me know
[size=9px](EDIT: I have a batch file that does the "dirty" job. ASAP I'll post it here)[/size]

The emulator of choice is no$gba (that despite its name, it is for ds too), but you can try iDeaS, that comes with a small debugger.
For the gba, you can use no$gba or visualboy advance.