Change Session Connection Timeout

Hello,
I recently was upgraded to WinSCP Version 5.15.4 (Build 9849) from 5.11.1 (Build 7725). Prior to the upgrade, my session would time out and automatically sign me back in after 30 minutes of being idle in WinSCP (according to the timer in the bottom right corner of the session) and I would receive the message "Connection has been unexpectedly closed". Using Version 5.15.4, this session time out is set to 5 minutes. How do I change this timeout setting?
Thanks,
Doug

WinSCP does not disconnect on its own (and never did).
It's the server (or something on the way) that does disconnects you.
If you want us to try to check, what caused the change, please post log files from both versions.