UModeler 2.6.9 and 2.6.10 have been released one after the other. These updates were triggered by feedback from a few users about broken lightmaps in play mode and disappearing mesh with smoothing group in play mode. I thought they were serious so decided to update UModeler for the hotfixes. Apart from them there are more improvements in these updates. Check them out below or here.
Hotfix : Fix bug where lightmaps are broken in play mode.
Hotfix : Fix bug where the gizmo disappear when getting back to edit mode from play mode.
Enhancement : Enhanced Tools > UModeler > Refresh All to fix invisible mesh and generate secondary uvs etc.
Change : Changed Generate Lightmap UVs to Lightmap Static and added Generate UV2 channel for Lightmap button to Local Settings tool
Hotfix : Fixed bug of primitive shape group tools and pushpull tool where pushing or pulling a face sometimes causes unexpected sudden move when the mouse cursor points at somewhere in the background.
Hotfix : Enables 3D cursor to be displayed in object mode.
Hotfix : Fix bug where UModeler meshes with smoothing groups disappears in play mode
Enhancement : Added Top Center, Center and Bottom Center buttons to Pivot To Center tool.