I've been using FITS Viewer for a while to check my subs before stacking - ususally four or five at a time.

I'm now finding that if I load more than 2 images at a time into FITS viewer it crashes but still works fine if it's just one of two. Any Idea what's causing this and how it can be fixed please?

Thansk, Graham

Update - just to say I reinstalled LStars & now working fine. No idea what was going on!