If you are opening a different build (same version number) it will redownload the modules. It only keeps one set of modules for each version laying around.
How can I export game, I every time get error 'module being donwloaded', I have 20 mbps broadband speed and I gave enough time to download everything, but there is no progress shown that says downloading something, but when I try to export it, it give me that error... frustrating... BuildBox version 3.2.1 Operating system : Mac Book Pro Serria 10.12.6
@Sangita, I had that problem once. All I did was save the project and close Buildbox. When I opened it again it was fine. Not sure if you will have the same results.