If you are running a 1.5.97 Skyrim SE build (either by choice or for mod list compatibility), do not use the vanilla CK. Download the patched executable, fix your INI, and enjoy a crash-free modding experience. Your sanity will thank you when you finally finish that player home in the Rift without the editor closing on you for the fifth time.
Download (or its predecessor, Creation Kit Fixes ) from Nexus Mods. skyrim se creation kit 1597 patched
Simply having the old files isn't enough; you need community-made "fixes" to make the tool stable and functional. If you are running a 1
To convert plugins into master files: