Thank you Steven and maciej. I have experienced the same issue, when migrating galleries from PC to Mac. I was having to go back to a PC to work on existing galleries. It's a simple matter, but it would reduce time wastage trying to convert backslashes every time. Looking forward to the change.
I have notified the developers of this issue (galleries created on Windows PCs cannot be opened on Macs) and they will certainly investigate further. If they can replicate the problem, then hopefully they will be able to fix it for a future version.