Version 2.0.0 is not an xcopy update. Many small breaking changes have been made. See the release notes for details. This guide explains how to import the renewals, but you might need to take other steps depending on how you use the tool.

When using an old version of LEWS or WACS (1.9.7 or older), it's recommended to upgrade to the latest 1.9.x version and forcing a renewal of all certificates before attempting to upgrade to 2.0.0. The reason for this is that new versions of the 1.9.x series automatically apply some compatibility steps, which may not have been fully tested for the built-in converter to 2.0.0.

Importing from 1.9.x is pretty easy though. In the main menu select the option More options... and then Import renewals from LEWS/WACS 1.9.x. The program will locate, convert and import the renewals from the previous version. It will also disable the scheduled task for the old version and create a new one for the new version.

The same thing can be accomplished unattended with the --import switch.

All imported renewals will immediately be 'expired', so it's a good idea to trigger a renew and check if all goes well before declaring the conversion a success.