I can only download one asset per load up?

Hi, Im brand new to unity and im trying to ge tthe hang of things and how things work. When I open the asset store and download a model or something it downloads fine, but I CANNOT download anything else… I have to save everything and re-open unity to download one more asset. Is this a bug or is it something implimented on purpose? Can I fix it?

I recon what you are experiencing is a bug, try updating Unity or create a new project and download assets into that project and copy them into your current project. If all else fails try a re-install.