When photoshopCS5 crashes or go through an update... i lose brushes

I started noticing that everytime my PSCS5 goes through an update, it wipes out all my brushes... today it crashed and i went to re-start it and again my brushes have disappeared.. this never happened before, but lately it has been doing this... i get all my brushes online and had no problems with it early on untill couple of months ago when it went through couple of updates and the next day i came in - re-start it and noticed that all my brushes have gone... could someone please help...im sick of re-adding the brushes everytime this happens...