I installed "Filter by correlation" plugin (obtained from: https://strategyquant.com/doc/programming-for-sq/filter-by-correlation-plugin-example/) in user/extens/Plugins. When I launch SQX, I see the "Filter by correlation" button next to Tools button under Builder and Retester tabs. However, when I launch "sqcli -gui" and access SQX via my Web browser, this plugin button is missing
After launching "sqcli -gui" three times, clearing cache and restarting my Web Browser, I can now see the Plugin button. So, it seems that this might be a Web Browser cache issue and therefore can be closed