endrift
commented
2 months ago This is a quirk of mGBA showing it as a select file dialog instead of select folder dialog. You have to just hit OK in the .shader directory. The dev builds have replaced the .shader directories with a zipped version that can be opened as a file, so this won't be an issue in the future.
Selecting load shader opens up a folder selection screen but when you choose the folder and click open the folder opens and there's nothing to choose inside the folder. I did a regular check to see if the folders where empty but there not. Windows prompt says mGBA Shader(*.shader) but there's no file with a .shader extension.