EasySnap 1.4 has been released and will be published within the next few days* on the Unity Asset Store.
With this release, multi-version support (Unity 2018.3 and 2019.2) has been added to improve the asset compatibility within the range of these Unity versions. Also fixed the broken demo scene and removed some bugs in debug mode and in the EasySnap UI.
The corrected version of the EasySnap manual is available on the local asset page.