TO be fair Chris is correct, you are unlikely to get much advice on such ann obscure browser on a general website (though I note from their site it only runs on select CPUs, I assume you have one of the ones it runs OK on?)
Normally the first thing to do with all browsers if they are crashing is disable all add-ins and see if that cures the problem, if it does start re-enabling them one at a time to try and find the one causing a problem. If it's not that then try backing up your profile then remove and reinstall it.