XnView: MP 0.95 - 64-bit
OS: OS X (10.13.6) - 64-bit
Effect: XnView will not open previously saved .sld file.
To reproduce:
1. Open XnView MP.
2. Click File/Open.
3. Choose .sld file.
4. Press Open.
Actual behaviour (bug): New window pops up "File can't be loaded!"

Expected behaviour: No crash, slideshow opens.