Beta release 0.25.0.933 of the voxel editor fixes two issues you may have come across using the materials and edit tools:

• FIXED - Voxel Editor - Materials - Editing a material property with the Pick Tool active, and then Picking another material from the 3D viewer no longer copies the property across to the newly selected material. Menu Tools > Materials
• FIXED - Voxel Editor - Edit Tool - Improved latency of input events when making edits which take longer than a normal frame to process. This resolves an issue where continuous editing mode can results in edits placed at a cursor location after the mouse button was released. Menu Tools > Edit Tool