On your system, you can play the PSP™Game software (games for the PSP™ (PlayStation®Portable) system) that you have downloaded from PlayStation®Store.
Using this menu item, you can verify or delete the add-on data for the PSP™Game software.
Select [Application Data Management] > [Add-On Data (PSP™)].
To delete the add-on data, select 
(Options) > [Delete].