Update README.md (#1248)

it wasn't clear, if all or only the statechart tool was required. (see instruction point 8)

README.md

@@ -45,7 +45,7 @@ If you are familiar with Eclipse plugin development then you may want to checkou
 5. On the *Projects* page, select *Github Projects*.
 6. Click on the green "plus" symbol. Copy the Link https://raw.githubusercontent.com/Yakindu/statecharts/master/StatechartTools.setup in to the text field.
 7. Click on *OK*. The project *Statechart Tools* is available as *Github Projects/<User>/Statechart Tools*.
-8. Double-click on the project *Statechart Tools* to add it to the catalog section at the bottom of the wizard page, then click *Next*.
+8. Double-click on the project *Statechart Tools* to add it to the catalog section at the bottom of the wizard page, then click *Next*. Choose only the "Statechart Tools". Uncheck the others, if needed.
 9. On the *Variables* page, choose a meaningful name for the *Installation folder name* variable, then click *Next*.
 10. On the *Confirmation* page, check the settings, then click on *Finish*.
 11. The setup is executing its tasks now. Meanwhile: Drink a cup of coffee, and watch your Statechart Tools development environment being assembled. Oh, and please review and accept any licenses for the software to be installed.