New:

• Added SteamVR Theater Screen support
• Added keyboard multi-laser support in the dashboard
• Added option to select individual elements to reset to the Restore Default Settings prompt
• Added option to toggle overlay visibility by double-clicking the Overlay Properties window title icon
• Added middle click to default Desktop+ laser pointer bindings for Index & Touch Controller to match SteamVR additions
• Extended action bindings entry limits (20 for global shortcuts, unlimited for hotkeys)

Changed:

• Changed strict window matching setting into an overlay property
• Overlays will now look for window matches again when the strict window match property is changed
• Laser Pointer Override no longer triggers while left mouse button is down, is pointing outside of any desktop, or is caught by sticky desktop corners
• The distance adjustment when scrolling during an overlay drag now works better with varying aspect ratios

Fixed:

• Fixed overlay drags being interrupted by the system laser pointer hitting other overlays
  This was caused by a regression in SteamVR 2, but has been worked around for the most part.
• Fixed double action entries when restoring from default settings
• Fixed incorrect cursor offsets on Graphics Capture combined desktop overlays
• Fixed incorrect display enumeration when there's desktops across multiple GPUs
• Various other minor UI fixes and adjustments

Optional Components:

• Compatible Desktop+ Browser Versions: v3.0, v3.1

For more details, see the Steam announcement.
This build also includes all changes of the stable builds until now (v2.8.3).

If you're interested in supporting Desktop+'s development financially, head over to my Ko-fi page. Any kind of help is appreciated!