HTML changes in the editor will not be displeyed on the homepage

Hi All I have got the following Problem with my page: - I installed catch evolution free - I customized the file "catchevolution-themeoptions-default" at the line "Copyright © 2013 Club Seduction. All Rights Reserved." by attaching the letters "xyz" - I deleted the letters in the editor again and saved. But when i open my side the Letters are still there. I tryed to fix this issue by - Delete Browser Cache - Using different Browser - Delete "catchevolution-themeoptions-default" and install new - Overwrite "catchevolution-themeoptions-default" - Delete Theme and install again Any ideas?