I activated the Send and Receive scheduler, but all the controls seem to be disabled now.

The Send and Receive scheduler is primarily intended for use on the local server computer in a multi-machine install, where it can be set to run continuously.

When the Send and Receive scheduler is activated, Kadoe Client enters a waiting state, and all other program functions are temporarily disabled.

However, while the local server machine may be in a waiting state, Kadoe Client can be used as normal on all other machines.