New computer

I recently got a new computer and is there a way to import the library of modules I had on the old computer to the vassal I downloaded on the new computer. Or do I have to just download all the modules again.

Ron

Modules are independent of Vassal and are not kept in the Vassal directory. You can put them anywhere on your computer. Clicking on a module, regardless of where it is located on your computer, will start Vassal.
Thus, all you have to do is copy and paste the modules to the folder of your choice on your new computer.