Version 3 is no longer receiving security or compatibility updates. Even if you find a working private code, you cannot update to the latest 3.x build, which fixed critical bugs with PDF 2.0 files.

For case #3 and #4, Quite Software offers a no-credit-card trial. For case #1, open-source or freemium alternatives exist (see next section). For case #2, the honest answer is that cracked codes no longer work with modern OS updates (Windows 10/11, macOS Catalina and later). quite imposing plus 3 serial number private code work