Running more than one instance simultaneously?

["J.B. Nicholson-Owens" <jbn forestfield org>]

I am trying to run multiple instances of EasyTag 2.2.3 simultaneously. I 
want to be able to save tags in one instance for files in one directory 
while I edit tags for files a different directory using another instance 
of EasyTag.

I can't currently run more than one instance of EasyTag 2.2.3 
simultaneously as the same user. Opening a terminal window on GNU/Linux 
and running "easytag" from there focuses the first EasyTag instance 
already running.

Am I supposed to be able to run more than one instance simultaneously?

How is it possible to run more than one instance of EasyTag 
simultaneously as the same user?

Thanks.