Not much to add to Richard's detailed reply except mentioning that I subscribe to the idea that the "stable" channel is likely the most reliable and light on maintenance, so I only use TWS and GW versions therefrom. If IB announced that a "stable" version is no longer supported, I guess it must have been really old enough to warrant an upgrade. I will typically check and upgrade myself about once in a quarter on ad hoc basis, so I'm now using TWS 10.30.1t on my home-office development computer and GW 10.30.1u on my unattended trading virtual private server which is a cheap 24/7 machine where I rely on auto-restart and weekly manual logons through RDP, without IBC.
--
Best,
DS
