I have a two cabinet OS7200 with V4.46d software. The Installation Tool I am using is V1.53c. When I use Installation Tool, key programming is not displaying correctly, or if I try to change a key, it can change another keys programming. For example, phone has RP 1 to RP 4 keys on buttons 8 to 11. Change button 12, button 10 on the same phone will change or disappear, or buttons on other phones will change. Can look at the keys, but changing them causes a problems on other keys on other phones. When programming keys via the phone, all is fine, no issues. Only when using Installation Tool programming keys is a problem. Does not matter if programming remotely or connected directly with laptop. Has anyone else had this issue? If so, is there a resolution? Thanks.