When opening something that prompts the file browser. Instead of adapting to macOS Dark Mode it stays white.
To fix, all you need to do is replace:
</dict>
</plist>
in the Contents>Info.plist, with:
<key>NSRequiresAquaSystemAppearance</key>
<string>NO</string>
</dict>
</plist>
Doing so will allow the application to adapt to MacOS's System Appearance.
Fixed in beta.