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The Filesystem Browser
Sometimes higan will need you to choose a file or folder. For this, it uses a special Filesystem Browser dialog. Although many operating systems provide a native filesystem browser, they do not all allow the same customizations. Therefore, higan provides its own filesystem browser that works the same way on every platform.
The filesystem browser shows the contents of some particular folder, and allows you to select one of those items.
Across the top of the window, a text-box displays the path of the current folder. If you want to browse a specific path, you may edit the contents of this box and press Enter to switch to the new location.
The 
button is "Refresh".
Pressing this button will check
if anything has been added to or removed from the current folder
and update the list to match.
The 
button is "Home".
Pressing this button will switch to your home folder.
The 
button is "Parent".
Pressing this button will
switch to the parent of the current folder.
Most of the filesystem browser lists the contents of the current folder. Double-clicking a folder, or selecting it and pressing Enter, will switch to showing the contents of that folder. If the list has keyboard focus, typing any text will jump to the first item in the list whose name begins with the text you typed.
If a drop-down list appears in the bottom-left, it allows you to choose which files appear in the list, based on file-extension.
If this filesystem browser is asking for a file, you can choose one by double-clicking it, by selecting it and pressing Enter, or by selecting it and clicking the "Select" button in the bottom-right.
If this filesystem browser is asking for a folder, you can choose one by selecting it and clicking the "Select" button in the bottom-right. Double-clicking or selecting and pressing Enter don't work, they just switch to viewing the conents of that folder.
The "Cancel" button in the bottom-right closes the filesystem browser without selecting anything.