Hi
I opened my Katalon Studio as usual and could not find anything its like starting fresh again
Object Repository, Project, Test Cases all are blank even the folder structure is missing
worked on Project for one month and today all of sudden I cannot find anything
Can someone please help 
Please check if the project directory is there or not using Windows Explorer or Mac Finder. If you can’t find it, nobody would be able to help you. But I suppose you can find the project directory with contents. If it is there, everything is not yet wiped out. Just Katalon Studio GUI is not displaying it for some reason. You can restore the project somehow.