Blockland downloads all "resources" so you can see the files. With default settings, Blockland only downloads vehicles model files, and some other models. Models you do not have will be replaced by defaults.
They will not be in your server because it will only download the models, not the scripts.
I'm assuming by "winwar" you mean zip. It will not be a "winwar" file, it will be a fold with just the shapes it downloaded.
If you want to download more files, so you can see custom guns and stuff like that, go to options, and click the "Network" button at the top. Then you can uncheck what resources are downloaded.