Convert rbxlx to dae

Download and install the latest version of Filestar.
Right click on one or more Rbxlx file(s) on your desktop and select Convert with Filestar.
Type convert to dae in the search box.
Press Convert.

What is the difference between .rbxlx and .dae?

Name: Roblox XML Place; Collada
Extension: .rbxlx; .dae
Format: Text
Category: 3D Model; 3D
Developer: Khronos Group
Description: The Collada file format was developed to permit cross-platform collaboration when using different design applications. DAE is an open-source format that uses the XML-based schema allowing it to effectively transverse across multiple programs.
MIME Type: model/vnd.collada+xml
Sample: sample.dae
Wikipedia: .dae on Wikipedia