Same problem here, unistalled, deleted Config-folder, but i get the same Error, on Win7x64/CS6
Can´t even find the file on my PC after doing a search (including hidden files etc): WA_DocumentEditing.js
And i get a new JS error after ive unistalled DB 1.07 see image nr 2 when i close DW (with no DB installed)
Installing 1.06 again see if that sort the 2 problems out.
Yes that fixed the problem, i saw that in DB 1.07 there was 2 new behaviors in the Webassist panel that not is in 1.06.