I just tried v2.05.01 under of BrowserTraySwitch under Windows 7 Ultimate 64-bit (RTM), and it failed miserably!
First ominous sign was that no icon appeared on the desktop at the end of installation.
Then when I left-double-clicked on the tray icon it didn't launch the default browser, but instead opened its BrowserFiles sub-folder.
And when I left-clicked on the system tray icon it opened the same folder (BrowserFiles), and only when I closed this window did the tray icon context menu appear -- but it was situated on the Windows Desktop near to where that window closed rather then next to the tray icon.
Pity, it would be rather useful.
Cheers, Tony Austin.