Problems downloading Nerve dmg file

I've tried to download Nerve twice now to my MacBook Pro (with Lion) but the file seemed to be corrupted both times. They are also of different sizes...

I already have Nerve installed on my PC - is it possible to simple copy the sample library from and install only the software on the Mac? Or is there some problem with the servers maybe?

Also, under my account, it still says 0/4 downloads even though I've tried twice...

Thanks,

Giannis