Do you have all your devices hooked up (and on) when you launch FMLE? For example -- your camera or digitizer? When FMLE launches it will try to launch with the last known settings... including input devices. If it can't find these devices (they're not hooked up and on) it can crash, although in most situations it will simply show a default screen with default settings.
If you do have your equipment hooked up (and on) when you launch FMLE, try unplugging them and then launching FMLE so that it opens up in default configuration mode (no input devices selected; all default settings). Then uncheck the "preview" boxes for both your input and output preview windows. Close FMLE and then plug in your equipment (and turn it on) and relaunch FMLE. I offer this suggestion as FMLE can sometimes act funny when the preview windows are open with certain types of input devices. Don't worry -- you don't have to keep the preview windows off forever. If you can get FMLE to successfully launch with the preview windows off, then you can set your settings however you like and save the profile. Then quit and relaunch FMLE and then turn the preview windows back on and see if it works. If it does, great. Just be aware that making any settings changes while the preview windows are open could result in FMLE crashing. Again -- this only happens with some capture devices, such as certain Dazzle capture boxes.
If none of this works, you could always try to upgrade to FMLE 3.2 and see if that solves your problem.
link - http://forums.adobe.com/thread/1208980