I guess I would have to pay CS-Cart to upgrade my custom made module?

I paid CS-Cart to make a new custom payment module for the gateway I use as the existing one for the same gateway isn’t working. But now as 2.0.3 has arrive, this module will not work with v. 2. So I guess I would have to pay them againg to update the module?

If I could I would definately let CS-Cart integrate my existing module into the cart as I believe more people from Norway, Denmark and Sweden would be interested in it.