Open Device Manager → Ports (COM & LPT). Note the COM number assigned to your cable (e.g., COM4). In CPS, go to File → Preferences and set the same COM port.

When you see “exclusive repack” or “cracked CPS” for Motorola GM338, you expose yourself to serious risks:

In short: No reputable technician uses a “repack.” The risk far outweighs any perceived convenience.

eBay and radio forums sometimes sell original Motorola CPS CDs with transferable licenses. Ensure the license key is included and not hardware-locked to another PC.

Click Write. Wait 20–30 seconds. Never interrupt power during writing.