Customize Ultimate Affilliate Pro plugin

We purchased Ultimate Affiliate Pro plugin and we need to customize few things. One is about changing the time of commission being granted and second is to provide users a custom input value for wallet codes ( not selecting each individual commission by hand)
Plugin page: https://codecanyon.net/item/ultimate-affiliate-pro-wordpress-plugin/16527729
Wallet help page: https://help.wpindeed.com/ultimate-affiliate-pro/knowledge-base/wallet/
We have detailed description what we want but we are open for new ideas for this things.