I can't log into any SQL 2016 or higher instance using wither Windows or SQL authentication.
This is a current issue with connecting to SQL 2017 - See http://community.idera.com/free-tool-forums/f/idera-sql-query-store-optimizer/27065/linux-2017-connection-raises-not-connected-because-sql-server-2016-or-higher-is-requred
If you encounter an error connecting to a SQL 2016 instance using a Domain Name for the instance (i.e MyServer\SQL16) try connecting using an IP Address but make sure the SQL Server protocols for IP support are enabled.
We released SQL Query Store Optimizer v1.1.
This release supports Microsoft SQL Server 2017.
The download files are available at "https://www.idera.com/productssolutions/freetools/sql-query-store-optimizer/registrationform".
The version numbers and dates of the latest releases of the free tools are available at "http://community.idera.com/free-tool-forums/f/forum/23176/kb-what-are-the-latest-versions-and-release-dates-of-the-free-tools".