If you make the changes I suggested in the previous post, then you have 64bit support.
We've tested this on linux and on windows.
We did not test pdb support as we don't need it, but you can of course test this yourself.
It would be nice if the author of CrashFix server would incorporate these changes, but there's no reaction from him on this forum or on the sourceforge issue tracker :(
On the sourceforge issue tracker I've also posted some fixes for the webinterface, see
https://sourceforge.net/p/crashfix/tickets/18/