Hello sathyan
If the CNC drilling application was accidentally deleted, the best way to recover it is to reinstall the software package provided by the machine manufacturer. Since this app was developed in China, you will need to obtain the original installation media or download link directly from the vendor or their authorized distributor.
If you do not have the installer, please contact the CNC machine manufacturer’s support team—they can provide the correct version and ensure compatibility with your hardware. In the meantime, avoid using third‑party recovery tools, as they may not restore the application correctly and could affect machine stability.
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Harry.