KeyBoard Symbol Issues Ukulele

PS Ukelele cannot change or replace anything on your machine. To get the right key mapping, you just need to have the right item showing in the "flag" menu at the top right of the screen. For a Swedish machine, that is normally Swedish Pro, like this:

On that the middle row key next to return normally produces apostrophe and star, with ™ when you hold down the option key.

Ukelele is used to create custom keyboards which you have to install on your machine. If the one you created doesn't work right, you just remove it. Normally they are located in Home/Library/Keyboard Layouts or Library/Keyboard Layouts.

Even without removing it, you should be able to deactivate it in system preferences/keyboard/input sources, so you will just have your normal keyboard present.

I don't think Ukelele can be used to program Return, just normal characters. You might check an app called Karabiner.

The best place for Ukelele questions if you keep having trouble is their user group:

https://groups.google.com/forum/#!forum/ukelele-users