Opened project to run test and all my Variables are gone. The Variables directory with all my Variables is still there?
There was an issue like that reported in older NeoLoad versions but it was a long time ago and only 1 or two customers reported such issue. Were you doing anything special before loosing your variables?
In case you case use a backup configuration file to retrieve them located at the root project folder. There's a post in that community with the procedure.
Just start the application. Can you provide the link to restoring the config file?
A quick search returned this http://answers.neotys.com/questions/258724-what-do-i-do-if-my-project-won-t-open-and-i-get-an-error