EasySnap 1.3 has been released and will be published within the next few days* on the Unity Asset Store.
With this release, support for tags and automatic manager id handling has been added to the asset.
The source code has also been updated to support Unity 2018.3.7 instead of the old 2018.1 (also leading to a smaller package size) and a design-only bug has been fixed (thanks for the report!).
The corrected version of the EasySnap manual is available on the local asset page.