. An upgrade link is usually sent to the email associated with your account.
For technical assistance with installation or recovering a lost serial number, you can consult the ABBYY Help Center . FineReader PDF 16: Release 2 build 16.0.13.4766
If you are looking to use or update the software safely, here are the official ways to do so: Official Download and Activation
: Ability to save comparison results in Microsoft Word with "track changes" enabled.