Crashes or repeatedly killing Quicken while it's in the process of writing transaction updates may damage the data file and render it useless, beyond repair. Please perform all the steps in this document in the order specified, even if you have done some of them before:Advanced Data File Troubleshooting to Correct Problems With Quicken for Windows
If you haven't done so already, I'd say it's time to call Quicken Support on the phone and request help. Let them do a screen share session with you to review the situation on your computer, to determine the nature of the problem and to figure out how to fix it.
Quicken Support: