Hi,
The Betfair graph is not displaying in our current official version (1.3.0.47) following a change that Betfair made to their website.
This has been fixed in our next release which has not yet been officially released.
To get the new version early, uninstall via Windows Control Panel and then install via the following link:-
https://www.gruss-software.co.uk/Betting_Assistant/Betting_Assistant_1_3_0_48b.msiRegards,
Mark