Help me??

Hi, I'm new, and I just downloaded the multiplatform version, but it doesn't seem to open, it is classified as read only. I'm on a Lenovo chromebook, any help would be appreciated.   

Open the .bat file for your operating system and follow the instructions on the prompt. Instructions here: https://github.com/Stencyl/stencylpedia/blob/master/releases/4.1.0.md#multiplatform-release