You need to upgrade to the latest version 1.1.0.65n.
1) Uninstall the current version using the windows control panel.
2) Install latest version from
http://www.gruss-software.co.uk/Betting ... istant.msi (sorry you will lose your preferences and have to re-input them)
This version has a tick box at the top of the conditional bets form: "Allow bets to be placed in play". If this is not ticked then the conditions will be ignored if the market is in play.