Keyboard macros ensure that keystroke combinations intended for the target server are sent to and interpreted only by the target server. Otherwise, they might be interpreted by the computer on which the Virtual KVM Client is running (your client PC).
Macros are stored on the client PC and are PC-specific. Therefore, if you use another PC, you will not see your macros. In addition, if another person uses your PC and logs in under a different name, that user will see your macros since they are computer-wide. Keyboard macros created in the Virtual KVM Client are available in MPC and vice versa.