As a suggestion, go back to your original data file and using a demo mode download update the file to Moneydance 2015. Then make a backup of that one and then update it to MD 2017. This has corrected some issues of skipping too many versions during an update.
The other is to export your file in MD 2014 and import it in 2017. This may also lose some data but should keep all the stock prices.
sth, thanks for the advice. I was able to get things working based on your first suggestion. I have some file location issues to clean up, but I am back and running. I am surprised that the size of the file is about half the size of the MD 2014 file?