melartin,
The dialog that opens when you press Ctrl+Shift+T depends on the type of the file that is in focus in the editor area or if the editor area is empty/out of focus, then it depends on the selection in the Explorer view. So unless you have a TypeSript file open or a TypeScript project selected, you should not be seeing the Open TypeScript Symbol dialog.
Can you please clarify for us when you are seeing TypeScript Symbol dialog – do you happen to have a TS file open or in a project with has the TypeScript facet enabled (right click on the project > Properties > Project Facets) is selected in the Explorer view? If possible, please share with us a screenshot of the IDE to help us get more details including the Perspective you are in.
The Open Type dialog can also be accessed from the Navigate menu or from the toolbar – I’m afraid there’s no way to currently disable the Open TypeScript Symbol dialog, but we’re looking into this problem – with your notes we should be able to get it to behave correctly.
Apologies for inconvenience caused.
–Swapna
Genuitec Support