when I used Ark Dev Kit then I click RMB ,the program has stop working.
no just let it load, until it caches up everything it will take a while to load
Did you install it via the Epic Launcher? Have you tried verifying your game files?
How does it “stop working”. Is it giving you an error/warning dialog but usable, crashing after displaying an error report, or simply freezing up. If it’s giving a crash error please post it so we can help identify the issue. If It is freezing just go make some lunch maybe grab a coffee, it just needs space to think like uzumi said.