-Double-click markers to jump to that frame.
-Drag painting input was one frame behind cursor.
-Some commented-out code for stuff I was messing with may also be present. (All edits were marked with SuuperW comment line.)
Auto scaling: All user controls should have AutoScaleMode set to Inherit (i.e. they inherit their containing form's AutoScaleMode, in this case Font). Explicitly setting an AutoScaleMode on user controls causes problems with child controls anchored to the bottom and/or right.
Remove explicitly set font in GenGameGenie form. Fonts set on the form/user control level cause problems with auto scaling.
Fix text box anchoring in DualGBFileSelector control.
SuuperW