New pay for new update

[LoveHate]

hi

I have a file for $ 5. After two months, I will update this file and it will cost $ 10. I wanna that previous buyers can pay the new price and then download the file. what do I do?

[qwert]

Does this file have an extension or a one-time fee?

[LoveHate]

it has an extension 

[qwert]

If so, you may have to cancel all renewals for all members.

[LoveHate]

good action.

tnx