I have a windows 10 HP (brand new) and installed DC pro. I opened and started working with a large PDF (60 pages) and was editing and commenting on the document. I got 1/3 way through my edits and the the program froze not allowing me to do anything and when I click i get a tone sound. I cannot do anything. I don not want to lose my work and do not want to force close. HELP. This is very frustrating.