Cannot reopen saved slideshow

[szf]

version: 2.04 (portable)
After saving slideshow cannot be reopen.
Steps to duplicate:
- create slide show playlist
- save it - the file has been created with wpl extension
If you try to open this playlist with wpl extension, the file browser of xnview cannot show it. It only will show playlist files with sld extension.
Workaround: create playlist file using older version of xnview (like 1.99).

[xnview]

The wpl playlist is only on export