Hi Chanchal,
as Thomas said, the porting Membrane Monitor to use the tycho-maven-plugin is on the way. An official distribution for 64bit Linux will be available once that is completed.
Note however, that 32bit vs 64bit is a mere packaging difference, as Membrane Monitor is plain Java. Replacing all native components (OSGi and Eclipse SWT) by their 64bit equivalents would do the trick at the moment.
That said: Is there any specific reason you need a 64bit application? I'd be interested.
Best, Toby