Can't get calibre window to minimize

I have installed 0.8.60 but somehow when I try to run calibre in minimize mode, the screen expands across the window to eight or nine screen widths. It look like there is a hugh open area in tag browser. I can't get the side scroll bars to allow the area to be narrowed. The hugh width in tag browser is in both mini and maxi views but in max view at least I can see the entire program screen without endless scrolling across.

At first I thought somehow I had slipped and pulled the panel wider but if that were the case I should be able to fix it by narrowing the area to fit, right? Am I making any sense? Any help would be appreciated. p.s. I don't "speak" program language so please be gentle...