- you'd need a sensor bar for each screen and be able to differentiate 
them (simply not possible)

- you could cut try to simple extend screen space to multiple monitors 
(would give you a sensitivity that is factors higher on the X axis 
than on the Y axis PLUS you would have to point at one and the same 
screen regardless of which screen you actually want to put the cursor 
on => both of which is absolutely non-intuitive IMO)

Remote Buddy's solution to most of these problems:

- bind the IR mouse mode to the screen that you selected for Remote 
Buddy to view it's menu on (Preferences > General).

- allow that selected screen to be chosen by an action you can map to 
any button (=> available in all mapping popups under "Screen Settings" 
- it's the last action that's offered there)

Regarding Dock / Menu bar:

On OS X, an app has to modify its own Info.plist inside it's own 
application bundle (Remote Buddy.app/Contents/Info.plist) to tell the 
system *at start time* whether it wants its icon in the dock (the key 
NSUIElement does not exist in Info.plist) or not (the key NSUIElement 
exists in Info.plist). As the downloaded DMG is read-only, it can't 
change the Info.plist file, will recognize that after it was restarted 
and notify you about it in the Preferences. That it did ask you for 
admin rights is owed to the fact that it previously determined that 
with the current rights, it can't rewrite its Info.plist. What RB 
could not know is, that even with admin rights, it can't write the 
Info.plist file, because it's on a volume (the mounted DMG file) 
that's permanently read-only.

There's however no way that changing this option will ever change any 
permissions nor that it can affect your trial period. It reads the 
Info.plist and tries to rewrite it. That's it. If it can't write it, 
oh well, it simply can't. But it will never ever change or "mess up" 
OS X permissions nor does it change anything that relates to trial 
periods.

Hope that helps.

Best regards, 
Felix Schwarz