Simplify the following text for a Grade 4 native English-speaking person.
Original: As of 2007-10-10 , the most recent stable release of Linspire is version 6.0 which was released in October of 2007 . Linspire is available to download and costs US$ 50 .
Simplified: On July 10 , 2007 Linspire released Linspire 6.0 , based on Freespire 2.0 .