Next Gen Thumbnails

I have had my NextGEN gallery up for a few years. A little while back my thumbnail gallery began displaying with 3 images in one row and wrapping 1 in the next. I’m aiming for 4 per row. I’ve set 0 for the number of columns. I’ve reduced my thumbnails to 210×210 with the max width at 228 – with 20 per page. (When it worked previously, the thumbnails were actually a bit larger). The page width is 960, so there should be plenty of room. I deactivated my plugins and it changed nothing. I’ve looked through the forum and have found some possible solutions, but none have worked. Short of going back to NG 2.0.40, I’m getting desperate. I’m using the responsive theme in full-width.
I’m hoping it’s some little tweak that I missed. Hoping someone can help me. Thanks, in advance.