Problem loading cdr file in X7 but not X6?

I have tried to open several files (all related to the same client) in X7 only to get a loading error followed by the program crashing.   Normally, I would assume the file was corrupted, but I have opened these before and I can still open them in my older X6 version.  

What is going on here?  

I even created a new file in X6 based on the information in those same files and that new file will not open in X7 either.   Do I have some corrupt information that's only in these particular files for this particular client?   And why only recently can I not open these files when I have accessed them several times in the last 6 months?  

Note: These files are saved as 11 or X4 versions so my boss and/or our factory can open them with their versions of Corel.

Note: I do not use macros

If there is a fix that would be great, as I'm already really tired of X7 crashing ALL THE TIME.   In fact, I don't think I've properly shut X7 down in about 2 weeks now, and yes my updates are all up to date.