I am also getting constant Enpass crashing on version 5.60.
I am running on a brand new Macbook Pro 13" 2017 (With touch bar) Running the public release of high sierra. Enpass is in the default location, synced using google cloud. My region and keyboard is set to English (Canada). I have not recently changed my master password.
I think it might be related to High Sierra because it is also happening on my iMac at work. It seems to possibly related to using the firefox extension. It seems to crash fairly consistently using it.