KiCad 4.0.2 is hoplessly outdated. (And has a lot of bugs that have been fixed a long time ago.)
At least update to 4.0.7. There will not be any updates to version 4. KiCad is already at version 5.0.2. The next release will be 5.1.0 (Project compatible with v5.0.2 but new user interface)
If you really only just started then i would suggest you switch directly to version 5. This will require you to transfer your current project to version 5.
These two articles are a must read if you decide to go down this road: