I am wondering where you get your 1gig figure from. The app only uses just over 100Meg of real memory, though it can,will and does allocate and report far more virtual memory being used - this is not anything to be particularly worried about, unless your hard drive is >90% full. Are you experiencing any performance deficit?
Also current OS's are increasing larger and 4gig is just standard entry-level requirement these days, and any serious user will naturally increase this amount, particularly if working in audio or video .
KMI StringPort_1650, SoftStep_VK2 v1.2 & MIDI Expander; Mac_Moore Guitar,
Roland VG 8, 88 & 99, YamahaVL 70m; OSX 10.6.8, iMac i7 2.8G QC; MaxMSP 5.1.8, Ableton Live 8.2.2, M4L, SC3, QC, cSound, etc, etc,