Crashing Possible Solution
I'm fairly new to this but I had the same issue when my dynamic pages were freezing and crashing. After research I found an article that said to do the following:-
Locate the WinFileCache file in c: User /"your name"/appdata/roaming/adobe/dreamweaver Configeraton
Rename the winFileCache ie BackupWinFileCache ( Just in case doesnt work for you) with this absent a new one is created.
My Dreamweaver data assist works a treat now -- I have seen other suffering with this and it worked for them also! Realy do hope it does some good!