I just installed TWS on new CPU, only to find this annoying pop up "order confirmation" on book trader.
Fortunately, I have TWS 905 on other CPU. (I haven't updated TWS for over a year apparently, the updates tend to mess up other software that connects through the API (like bracket trader) because of changes in release notes etc., so I just stopped updating)
TWS is currently version 907, and the oldest release download from IB is version 906, which still has the order confirmation pop up.
So I used the C:\JTS and Java files from my old CPU and copied them on a flash drive and transferred them to the same file location on new CPU and got the old TWS with single click entry working on 2nd computer.(the files were around 1Gb) Unless IB makes updating mandatory, I'm in the clear.
IB denied the feature poll to get rid of pop up confirmation. Oh well.
An alternative to using Button trader, zeroline, bracket trader, is to find someone with tws 905.....