Magic Sheet Custom Symbols Mac to PC Problem

Recently I opened a show file from my @5 via a flash drive on my Mac Book Pro.  After tinkering with the patch and bringing in some new PNG files for Background Images, everything looked fine.  However, upon opening the file on my Nomad PC, the Background Images are Blank ( with the "X" icon) and many of the custom symbols have been juggled--ie a "mover" icon is now a North/South icon.  The same file reopens fine from the flash drive on the Mac.  I've repeated the steps and had the same result.  

2.8.2 on all machines.


2015 Macbook Pro Nomad (10.14.4 Mojave)

PC Nomad (Lenovo Windows 7)

Kingston FAT 32