GDE Editor and Reader won't load .gde file

[PaulHowardYoung]

Not sure what's happening, but yesterday I was happily loading the new distro Next guides to read. This morning when I try to do so, the browser just displays the default NextGuide.gde not the .gde I have uploaded via the "browse" load file button. Normally I use Firefox, but tried Edge too, with same result.