Easy to do (I think; the following is not tested!). Just set the upper <alpha> to 1 in gui/dialogs/fps.Xml, or to 0.5 for a semi translucent background. You can then change the color to whatever you like (you can also change the number's color there).
a) I don't know why there are 2 different versions for Macs. b) I have already reported a bug about not being able to transfer files from older versions into 2.4.0, neither can I place a new model in an existing category folder. This means I cannot use 2.4.0 to place new models.
Vic
Time flies like an arrow Fruit flies like a banana