The iPhone version explains it better.
It states prize money as, for example;
Prelim - £1m
Qual - £2m
Playoff - £3m
1/8th - £4m
1/4 - £5m
Semi - £7m
Runner-up - £9m
Winner - £10m
The computer version lists the same but then says;
Final - £9m
Win - £1m
The "win" money is just extra for winning the final