See the following website.....
Logic Pro/Express : Startup modifier keys for troubleshooting - Apple Support
In your case Shift and Control held down when launching LPX, might work..... It's called AU-Safe Mode
However, Logic shouldn't crash regarding its own EQ plugin so something else is probably going on.. maybe another 3rd party plugin that is the next to get validated, is at the root of the problem
If it's a corrupted project which is also a possibility or you cannot work out which plugin is really causing the problem then...
Create a new project and use STI (Selective Track Import) to rescue the corrupted project by importing tracks one by one from the old project into the new one..until you find the track and the plugin that is causing this problem...
http://music.tutsplus.com/tutorials/how-to-use-selective-track-import-in-logic-p ro-9--audio-3181
Note: This tutorial is for LP9 but it works much the same way in LPX too...