Maybe using something like autohotkey, I already use it to map some mouse functions to keyboard, here is a example of a full keyboard:
https://autohotkey.com/board/topic/16891-ahkosk-onscreen-keyboard/

You could use X-mouse button https://www.highrez.co.uk/downloads/XMouseButtonControl.htm
or autohotkey to achieve this, the first are easier to use, in both you can configure this behavior by application so it won´t interfere with other programs.
I use a autohotkey script and have a friend that prefer X-mouse.

There is opinions that limit more than tools, when I see those kind of attitude I think it is just sad. Fortunately by my experience there is not many professionals losing their time this way.

edit:, sorry if I seems hash to you, I am meaning just to those blender people you´re refering,

@krisidious said:

Blender looks down on we lowly SketchUp people as do most 3D Programs. We're not real 3D modeling...

I´m been using Snap Utilities, in blender, until now almost a dream come true.

(cgcookiemarkets.com)

Having the same problem, how can I fix it?

I use Photoline as a photoshop alternative, really fast and a nice set of features.
http://www.pl32.com/

If you´re searching for a free option you can use blender, this tutorial can help bake the texture from the hi poly model to the simplified one, as a advantage you can even break down some parts of your model and set the texture quality accordingly in that part.
http://cgcookie.com/blender/cgc-courses/low-poly-game-asset-creation-fire-hydrant-in-blender-and-unity-3d/

Very good, the grass are 2d pngs with transparency or 3d models?

@thomthom said:

@unknownuser said:

So all existing plugins must be adapted again

Only if they used binary libraries. Most will work as is.
I had two which needed updating; TT_Lib and Vertex Tools. Compatible versions are on PluginStore and ExtensionWarehouse.

I've set X for my shortcut to Delete, still inside vertex tools it doesn't work, only the delete key delete a vertex, even if I remove it from my shortcut list and keep only the X key to delete

edit: I got it now, inside vertex tools it is called erase not delete,

Really useful, many thanks.