Issue:

After you create your Script,  the Mapkeys can't be modified directly as below.

Solution:

  1. Select all the Mapkeys, and click Export Selected Scripts.
  2. Open the exported Scripts.list file using Notepad.
  3. For example, change QQ to SX and save the file.
  4. Delete all the previous Scripts.
  5. Import the modified Scripts.list file.
  6. As shown in the screenshot below, you can see that the Mapkey shortcut command QQ has been changed to SX