Simple Unity YAML Merge is a GUI aimed to make the setup and opening of Unity YAML merge a little easier.
Your configuration of git repository and UnityYAMLMerge are saved and remembered making opening the merge tool as easy as clicking a button.
The GUI is based on this article.
If you have a merge conflict on a Unity prefab or scene file, open SimpleUYM (configure if necessary) and click mergetool. Check after the results first before continuing.
These are default/example paths to guide you on where to look.
UnityYAMLMerge: C:/Program Files/Unity/Hub/Editor/2019.2.11f1/Editor/Data/Tools/UnityYAMLMerge.exe
Note: This also works if Unity is not installed through the HUB and with different Unity versions