4.16 works, but 4.15 and 4.14 crash

Yeah, Launcher versions. I didn’t choose the “source from GitHub” option

Hi! First time user of Unreal Engine. Version 4.16.1 runs fine, but I need 4.15 or lower for a certain plugin. Both 4.15.3 and 4.14.3 crash before I can open a new project, with the message “Unreal Engine has stopped working”. I tried to find crash logs using A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums but I couldn’t. Instead, I went here - C:\Users\MyName\Documents\Unreal Projects\MyProject\Saved\Logs and I found this (not a crash log):
Log file open, 06/20/17 11:09:26LogInit:Display: Running engine for game: MyPr - Pastebin.com

My laptop’s specs are - Dell Inspiron 15 3000 series, 4GB RAM (I’m aware this is low, but 4.16 works and I can’t afford to upgrade), Core i3 2.5 GHz, Windows 8.1 64-bit

Could you tell me why 4.15 and 4.14 don’t launch?

To be specific, I select a new project and the type (like Third Person) etc and it fails after I click Create

Hi. Welcome to UE4! These are Launcher versions of the engine, right? Or, are they from source…?