Get used to it, no one likes to wait on Werkspace.
Besides, as he said, the license is forever "valid", meaning you will have the permanent right to use the engine. As the EULA states however, the warranty period lasts 30 days, in which you will be able to obtain a refund in case of a software defect, but not if you actually "don't need it anymore". This warranty is only valid in the U.S.
That said, one thing has to be mentioned: I don't think anyone ever used the refund. Heck, I think most people would rather upgrade their computer to run the engine instead.
Have fun with the engine and welcome to the community