Interesting - Mine is preinstalled too, have you had a look around the App bundle to determine where the majority of the space lies? For me, ./Contents/Framewor

Interesting - Mine is preinstalled too, have you had a look around the App bundle to determine where the majority of the space lies? For me, ./Contents/Frameworks/ & ./Contents/Resources/ are equally about ~330 MB (about half of the total bundle size)