Hello Sina,
So the smartPad is not properly booting up, and I guess that you cannot deploy a new WorkVisual project?
If you have got a backup of the robot software, I would personally just put on that image and then deploy the most recent WoV project.
And while I don't know if that is the case with EasyHMI, KUKA sometimes likes to put files in multiple places.
So you could attach a display, mouse, and keyboard to the controller and search for your file name in the Windows Explorer.
If you don't have a backup image, I would take this as a prompt to make a backup once the controller is back up and running. The most convenient way is the KUKA Recovery.Stick, but you can of course also just remove the SSD, attach it to your PC and make an image with any other backup software - Macrium Reflect Free works well, in my experience.
Best,
Johannes