[Bdi4emc-help] apt

sorry for the basic questions, but i've been digging around and not figuring this out. my emc2/ubuntu has gcalctool version 5.6.34 but bdi lists 4.4.20 as the current release, i am spoiled by a couple features of the newer version. can i change the repositories for bdi so i get later versions for some of these things. also synergy-cad upgrades each and every time i do apt-get upgrade, can i correct this? thanks djs