Currently, I tried to use pgAdmin 4 to open my snapshot and it looks like I am having problems with restoring the snapshot into my Schema. I correctly attached my database and schema, but restoring the NationBuilder exported snapshot won't function with pgAdmin 4. It seems like pgAdmin 3 works just fine by following the wonderful documentation listed here: http://nationbuilder.com/ht_open_your_snapshot, but I feel like there may need to be some movement towards updating to pgAdmin 4 or pgAdmin 4 should be contacted directly in order to resolve the problems with restoring the snapshot. Thanks!
Thank you for making us aware that snapshots cannot be opened in pgAdmin4. At this time, we are not actively working on this issue. We look forward to feedback from the community -- as issues that garner significant community interest become a higher priority to resolve.