If you need a very old version (e.g., Kovai Kalaimagal 1998 for DOS), you can sometimes find archived copies on the Internet Archive (archive.org). Run these only in a virtual machine or an old PC disconnected from the internet.
4.5/5
: The professional version, which includes advanced research features and extensive printing capabilities, can be purchased online or offline. Mobile Support If you need a very old version (e