Proteron today announced the release of LiteSwitch X 2.0, a major update to its popular application switcher for Mac OS X. Version 2.0 allows you to exclude applications from the switcher so that programs not directly involved with user interaction do not slow down active switching. The free update also offers more advanced options including allowing the Tilde key to move the switcher in reverse, and an option not to gray out icons of hidden applications. LiteSwitch X sells for US$14.95.