[Fixed] Launcher stuck at 'Installing Game Client 186'

For the last few days my launcher got stuck repeatedly on 'Installing Game Client 186 0%'. I tried every possible solution I found and nothing helped me.

Using the program Process Monitor I saw what my issue was: The launcher tried to open the files LoadingIconAnim.dds and LoadingScreen.jpg in \swtor\retailclient\LoadingScreens. They were missing because I deleted them myself earlier so I did not have to look at the loading screen ingame.

Creating new empty files and renaming them to the two missing files worked!