No. Boolean Master cuts its own shapes and outlines straight into the mesh and rebuilds the area around them as quads. There is nothing to apply and no n-gons to clean up. Booleans between two objects are planned for a later version.

Boolean Master only cuts when the result is clean quads. The status bar says why (too close to a border, a sharp edge or another hole) and, for an explicit size, the largest size that fits. Make it smaller, move it or add a loop cut. Nothing was changed.

That copy would fall off the object or overlap a neighbour. Change the count, the spacing or the direction (R), or move the first hole.

Another add-on already uses Shift+Q, so Boolean Master did not take it. Use the sidebar buttons, set your own key in Preferences > Add-ons > Boolean Master, or add Place on Surface to Quick Favorites.

Yes. It edits the object's own mesh; Subdivision, Bevel and other modifiers stay on the stack. A half mesh made for a Mirror modifier is understood: the mirror seam counts as closed.

Lite cuts Circle holes Through and lets you change their size - enough to test the topology on your own meshes. Full adds every shape, Pocket and Extrude, Array, Symmetry, all settings, full F9 editing and Cut Shape from Curve/Text.

Install the full ZIP the same way. Both editions share the extension id, so Full replaces Lite.