I had the same issue yesterday.
Try :
-uninstal
-than delet the files in C:\Users\**\AppData\Local\Eden_DAoC or any hidden file in AppData from Eden
-reinstal

After some test it seems that the issue is related to the last launcher update. I can run it with an old version but as soon as it update i can't use it anymore

Hello,

Since today i cannot start the Eden Launcher.
I tried to unsintal then reinstal it, run as administrator, but nothing work.

It was fine yersterday and before.
As anyone the same problem?

Artham