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And new feature added : map can be scaled in one click. (For example possible make map bigger in 2x size, etc)

added bugfixes, now lightmap resize works
aaalso added cull face feature
full VIS editor (but button create new leaf not works because still don't know how to add new leaf, game cant see new leaves)
fps optimization
updated cmd line options

night builds can be unstable, check older versions in releases if one not working.

You can select and export multiple faces lightmap, or all lightmaps atlas. For filling flood I can't understand

The disadvantages are as follows:
You cannot edit world brushes whatsoever.
You cannot do crazy texture scaling since it's tied to the lightmap size.
You cannot edit clip nodes.

in newbspguy world vertices can be edited via face tool (but without collision changes).
textures can be scaled as need because now lightmap can be recalculated after any changes.
Clipnodes can be edited only for non worldspawn models via Vertex Transformation widget.

And now it support languages using language.ini files.

Now problems with parsing J.A.C.K fgd files solved.
Worldspawn model vertices can be edited using Face tool, but it not easy, and map crash if do big changes.
Whole map can be exported to .obj with all textures (for example convert part of map to .MDL to bypass BSP limits) but without lightmaps.
Also part of map can be compiled as func_wall and exported to .BSP model with working lightmap and collision to bypass BSP limits.

Also can export .wad from embedded textures. Import textures back to map. Can export files needed for HLRAD.exe for recompile lightmaps. Any bsp solid entity can be exported as .BSP model with working collision and lightmap.

New update has many bugfixes. Please create issue on GitHub if have problems or feature requests