I couldn't find anything about this in previous feature requests.
I leave Winscp open every now and then and would like to set a timer when the master password is required again.
This would sit in Options/security/Master password/Require Password after xxx minutes
We can also have the password prompt when Winscp is not active window for xxx minutes (I use Lastpass on Android and it gave me the idea for winscp)
I usually lock my PC but this would "limit" the exposure of winscp by itself.
Many, many thanks for your work quality so far.