How much does the program cost after the trial version runs out?
You can find the buying price on the Purchase page set up by the developer. The prices are automatically converted to USD (default US Dollar).
The price of Show Presenter is £30.00 GBP (approx $48.00 USD) for 1 copy or £50.00 GBP (approx $80.00 USD) for 2 copies. - Official website.
The payment method used is PayPal which is better in case something wrong happens.
Buying page: http://www.sax-n-dotty.co.uk/purchase.htm