Controller remapping tool running
What it means
JoyToKey or AntiMicroX is running while Visual Pinball X has a joystick button assigned. This may be intentional.
Why it happens
If the same cabinet button is mapped to a keyboard key in the remapping tool, Visual Pinball X and that tool may both react to a single press. Running one of these tools alongside VPX can also be a deliberate choice. The scan does not read the tool's profile and does not confirm any overlap. It only looks at VPX's legacy settings format (10.7 and earlier, in the Windows registry); the VPX 10.8.1 format (INI file) is not read.
How to fix it
If a button acts twice in game, remove that button from the remapping tool's profile, or close the tool while VPX runs. Otherwise there is nothing to do.
How Pincab Toolbox detects it
The process "JoyToKey.exe" or "antimicrox.exe" is running, and VPX's Windows registry ("HKCU\Software\Visual Pinball\VP10\Player") holds at least one assigned joystick button with a nonzero value; it is read only when no standard VPX 10.8 "VPinballX.ini" file is present. The scan closed nothing and changed nothing.
Check your own pincab
Pincab Toolbox is a free Windows scanner for Visual Pinball X and PinUP Popper. It finds and explains problems like this one. No account, no telemetry.
Download for freeCovered: Visual Pinball X (10.x) and PinUP Popper. Partly covered, read only: PinballX and PinballY (their settings and game lists). Not covered: Future Pinball, Pinball FX, Visual Pinball 9 and the other frontends.