I watched a tutorial, but the file converter doesn't work anymoreHere's what I do if you're using the new Roblox Studio.
Step 1: While in a project in Studio, go to file, Download a copy.
Step 2: When it asks you where you want to put it, change the file type to Rbxlx.
Step 3: Name it whatever you want and save it wherever you want.
Step 4: Upload it to Austiblox.