Freeze when adding / changing Recurrent Event

Hello,
thank you for very nice application I like it.
But when I am adding / changing Recurrent Event,
then it is freezing for about minute based on
Recurrent type.

Example:
Start Day: 06.10.2012
Until date: 06.10.2015
Period: Day
Amount: 150
Type: Expense
/ENTER

and then program freeze - it is very long calculating,
then come back to normal run.

I am trying and using also MyCashflow from http://www.wesleysteiner.com/mycashflow/index.html
and it is more quick in this calculations, because it is using XML file to store data.
But it have no "Save As/Open File" menu commands as your application has alright.

I am looking for some program with Cashflow Forecast with recurring events.
Also it will be go you program has some Cash Accounts like: Dad Cash Amount, Mum Cash,
Savings Cash, etc.

THANK YOU !
Best Regards,
Petr