Pathological map

I have a pathological map that "locks up" 3.7.3.4 when I try to load it. The players can evidently see the map, but I only see the map that was up previously and can't access any windows or buttons (almost feels like the new map is invisible over my screen and blocking everything). The map contains the images from Tomb of the Apocalypse so I don't want to post it, but I can send it somewhere if needed.

what you are trying to do exactly?
1. fresh install of 3.7.3.4 from 3.6.11 (I know, it's been a while)
2. Made a copy of my campaign folder
3. opened 3.7.3.4 and pointed it at the new copy of the campaign
4. Campaign opened with 2 maps currently "open". The "active" one worked fine, but when I tried to bring up the other "open" map, I couldn't access any windows or buttons. Tried clicking the buttons several times to switch maps. A player who was connected said they could see the map and move minis. I could also hear the DING when they typed in the game log, but couldn't see it. The D20Pro menu still worked so I quit.
5. Restarted D20Pro. Campaign started with no maps opened, but the player said they could see a map.
6. Restarted the computer, restarted D20Pro. Same as (5).
7. Deleted the copy of the campaign, opened the original in 3.6.11 and closed the offending map leaving only one map (that seemed to work in 3.7.3.4) open. Made another copy of the campaign.
8. Opened the new copy in 3.7.3.4, no problems. Tried to load the pathological map, same as before, map didn't open, couldn't access buttons. minis, or text fields.
9. Closed 3.7.3.4, deleted campaign. Made another copy of the original.
10. Opened newest copy of the campaign and DID NOT try to open the pathological map. Opened another map which worked just fine.


what OS you are using?
MacOS 10.13.5, D20Pro has 5GB available.

what rules system are you using?
5E