Application Editor "select" tool does not work in 11.4 SP1 on IE11. You can not use it at all.
WCC 11.4 SP1 (any OS)
Internet Explorer 11
This actually a known bug that was found and fixed during development on 11.4 SP2.
To resolve the problem, you will need to upgrade to any later version of WCC. The problem was officially fixed in 11.4 SP2.
As a workaround, you can enable "Compatibility Mode" on IE11 and the "select" tool will work as expected again. You can also use a different supported browser such as Firefox or Chrome.
Release: ATSYHA99000-11.4-Workload Automation AE-High Availability Option