The Remote Systems view (see Starting a single-service project from the Remote Systems view).
In the first context listed above (a single-service project) the single-service wizard opens immediately.
In the other two contexts the Wizard Launcher opens first. It prompts for a runtime environment, development scenario, application mode, and conversion type and then starts the appropriate single-service wizard. Also you must select the appropriate source files before starting the Wizard Launcher (see Table 1 in Table of runtimes, scenarios, languages, conversion types, and modes).