How to install Kiovi:
1) Download and unzip Kiovi (XK Editor)
2) Copy the folder wysiwyg to XOOPS "class" directory (NOT to class/xoopseditor, NOT!)
3) Copy the system_imagemanager.html to modules/system/templates to replace the existing.
4) GO TO your XOOPS "templates_c" and DELETE ALL INSIDE THIS FOLDER EXCEPT "index.html".
Now activate kiovi for some module that uses it, like SmartSection, for example, and use it!
If you don't do step 4 you will have several problems to install or run any editor. Read the thread where some people helped me:
https://xoops.org/modules/newbb/viewtopic.php?viewmode=flat&topic_id=53020&forum=28
Jordi.