Re-writing this post as my previous post is delete by system as i flagged by mistake.
I renamed the Test case folder and after that I lost all me Test cases.When you open test cases in Katalon, it shows blank.
I got a response to recover,Kindly resend those steps please.
If you rename the top level folders in Katalon (“Test Cases”, “Test Suites”, etc.), Katalon will no longer recognize them. This doesn’t mean that they are gone, just that Katalon will not show them in the project explorer. They should still be in your file system.
The Test Cases folder should contain a bunch of .tc files. These should be in XML format, and are not your actual scripts.
The Scripts folder should match the hierarchy of the Test Cases folder, and should contain a bunch of .groovy files. These are your actual scripts.
If you’ve changed the names of either of these folders, I’m not sure the expected behavior in Katalon, but your file system should reflect your changes. Katalon needs both the Test Cases and Scripts folders.