FineReader Engine installation fails with the following message:
Cannot install ABBYY FineReader Engine 12 to the specified folder. Another product is already registered with INSTALLDIR="<destination path>"
A possible reason for the issue could be that the INSTALLDIR value remained in the registry after uninstalling a previous version of the product.
To fix this, you need to remove unnecessary entries in the
HKEY_CURRENT_USER\SOFTWARE\ABBYY\SDK\12\Installations\ key containing the INSTALLDIR value in the registry.