After some testing, we've now updated the regular and beta branches to the latest versions. Now everyone will have the benefit of:

• Improved memory management
• Faster drawing (less lag/CPU)
• Fix: Some keyboard shortcuts that were not saving correctly
• Fix: Perspective Grid can be manipulated again
• Fix: Edit Grid tool back in the toolbox
• Fix: Potential crash when quitting Krita and saving changed image

Big thanks to @Seikatsukan for reporting the errors with the two grid tools, both of which were fixed today! :)

UPDATE: It looks like there might be a problem for some users who have "Scaling mode" set to Bilinear or Nearest-Neighbour filtering. If you only see the top-left of the image (or just a black canvas) then go to Settings->Configure Krita Gemini, and under the Display category, set Scaling Mode to "Trilinear Filtering". We're working on a fix.