Computer shutdown error after starting sync

[heukman]

hi !
I'm Korean, so I use a translator to write. sorry...
I was using the freesync file well for backup. But two weeks ago, the problem started.
Click the Sync button to complete the synchronization, and then click the Update button to / In Windows, the shutdown schedule is automatically executed, and an error occurs saying that the program already has a shutdown schedule.

1 / I didn't update the program last year, is it an update problem?
2 / The number of files to be synchronized is 20 million, and the capacity is about 5-6TB, but is it a problem because of the large capacity?

★ And when you synchronize and update two folders, is there a way to automatically update when the synchronization is finished?

It may be difficult to understand, but thank you for reading.