I just installed the 2018.07 update and to my surprise, I CAN NOT OPEN ANY PROJECT!
The error below always appears:
 

 
How can I revert to the previous version?

yikes

If you have been saving installers, re-install one of the saved versions. Before that, reboot (if the machine was not already rebooted after the update) to see if it makes a difference. Also make sure Win10 is up to date.

Its possible that you have a bad install. Can you try uninstalling and re-installing after rebooting your PC?
Also when you load the project do you see any messages showing the load progress before you see the crash?
If you can pm me a link to the dump file created (name in the screenshot) I can take a look at it.

It did not work. I uninstalled CBB, then cleaned the windows registry with CCleanner, rebooted Windows 10, installed CBB through the Bandlab assist, restarted Windows again, but the problem remains.
I suspect that it is some incompatibility with Kontakt because, in the version 2018.06, CBB presented some errors always the FIRST time that I opened the program. Hence I was forced to close CBB, open it again and then it worked.
But now it does not work anymore.
Will I have to restore a full backup of my C: drive (and lose several things) to be able to go back to 2018.06?

You may want to look at this thread http://forum.cakewalk.com/FindPost/3747569
 

did you try opening in safe mode?

Please send me a link to the dump file

Noel Borthwick [Cakewalk]
Please send me a link to the dump file

I already sent to you in PM hours ago

Im not sure if you saw my reply but your PM was missing the attachment. Please upload it to dropbox or google drive and send a link to the dump file so we can investigate further.