Yes, you can find it under the gamedraw menu->Optimization-> combine

Hope my answer helps.

Can you send us the object to take a look at or a video capture of what is happening, thanks in advance.

Hi Jim,

Make sure your handles are on the pivot\Global mode, this should solve the issue for you, if any other than that it will not be correctly handled.

What we will do is that we will try to make this change automatically but as I know for now there is no exposed API for this by Unity but we will try to do our best to workaround it.

We are working on this and hopefully we will have it soon :)

That's right and we are trying to figure out the best way to integrate our undo with Unity undo system, hopefully we will find a solution soon.

We are working on improvements for the UV editor, these fixes should be there soon

Yes there is a plan for improvements.

 however you can use Unity's built-in snapping by holding down Control Key while moving, rotating or scaling, the snapping settings can be customized from Edit->Snap Settings 

You can use Unity snapping by holding down Control Key and it will snap depending on the snap settings so you can customize your snapping values there.

When you save a prefab you should also include its dependencies as well, GameDraw should create a folder with all related meshes in it

you can generate proper lightmaps from the GameDraw menu-> Lightmaps->Generate Lightmap UVs

if you are doing this and the issue still existing with lightmaps then we might need to take a look it at so you might want to send us the file and we will check what is happening, also if possible can you send a video recording of the steps you are taking so we can take a deeper look at it and propose a better way of doing it.