Z:gnu-www-ja-gpl-faq--21e207-Suppose a program was released/en

Suppose a program was released in 2000 under &ldquo;the latest GPL version&rdquo;. At that time, people could have used it under GPLv2. The day we published GPLv3 in 2007, everyone would have been suddenly compelled to use it under GPLv3 instead.