Lately, I have had trouble changing the digital display settings for the autopilot's heading, altitude and IAS. When the + and - appear as the mouse scrolls over the digits and by pressing the mouse to change the digits, the digits sometimes change only by tens instead of by ones. In other words, if the display reads 314, for example, it can only be changed to 304, 294, 284, etc., but not to 313, 312, 311, etc. This makes it impossible to dial in the correct heading, altitude or airspeed. After a while, the ability to correctly make settings returns, but then the same thing happens again. Does anyone have any cause or correction for this problem? It's quite frustrating, and just appeared recently. Thanks in advance.

FSUIPC has a checkbox to correct that very problem. I don't remember the caption for the checkbox but you'll know it when you see it. R-

EdC, FSUIPC: Technical page/'Fix Control Acceleration' box addresses the problem you described. Make sure you have the 'Enable V/S sign connection' enabled also.