Hello,
i just installed this plug-in, but i get this error when i instal the SQL patch

15 statements processed.
Error ERROR: Cannot insert configuration_key "" because it already exists
Error ERROR: Cannot insert configuration_key "" because it already exists
Error ERROR: Cannot insert configuration_key "" because it already exists
Error ERROR: Cannot insert configuration_key "" because it already exists
Warning Note: 1 statements ignored. See "upgrade_exceptions" table for additional details.

When done, i can see the Recover Cart Sales Report link at the reports page, however the second link in tools is not added.

What can i do or try to get this working?

Greets, and thanks in advance for the help.