I don"t see any problem Carl, it"s not as if it is an online tournament.
Betfair have only collected the money on behalf of APAT. I"m sure Betfair are good for a couple of bob. They only have to pass the funds over to APAT in time for the live tourney, an accounting matter.
They haven"t failed so far and I don"t see the change of software having any effect upon that. Betfair are not being bought out, or merging with another company, they are just joining another network.
Don"t worry and take a chill pill mate