What is the difference with phpld 2.x(free) and phpld 3.0(pay).? If i have now a phpld 2.0 i can changes whit 3.0 but i don`t lose the link submited?
Of course. There's almost no difference between them. I have just upgraded my script from 2.0 to 3.x (6 months ago ) without doing any database changes.
I used to have the free version, but I think the paid version is worth the $25. Over the long run it will save you time and you can offer more options to your visitors. There is more support/templates for the paid version. Your database will not be lost, but you should save it before upgrading to 3.1