Edward,
Sorry to hear you are running into this issue. I would recommend you a clean re-install. Please follow below steps –
1. Run the uninstaller.(In case you have existing MyEclipse profiles)
2. Make sure the MyEclipse Install Directory has been completely removed
2.1. Pulse Install Directory, on XP it’s under C:\Program Files in \Pulse or \Genuitec, and on Vista it’s under <USER.HOME>\AppData\Local and then under \Pulse or \Genuitec again
3. Then make sure the pulse2.locator file under <USER.HOME> is erased as well
4. Re-install ME 8.5 M2 using pulse.
Let me know how this works for you.