Without root, probably not. It will really depend on where the install put the files: if it stuck them in a directory in the user-accessible part of the internal storage then it's just a matter of figuring out where. But anything it put in the /data/app area where the app itself is installed you can't look at without admin privileges, i.e. without rooting the phone (which, if it is possible at all, will on most phone include a factory reset at an early stage of the process).