My Windows 7 Photoshop CS4 program suddenly began having tool issues: my tools used to stay selected, but now two or three of them don't. The magic wand tool changes to the quick selection tool when I click it (unless I scroll down to it every time I change from another tool) and my polygonal lasso tool similarly reverts to the lasso. This happened right after I edited some preferences. I realize Adobe doesn't want me to keep using CS4, but it's all I can afford. Ideas? Thanks in advance.