Dear Timur Tukel,
Please go to "modules\mod_yt_k2category\mod_yt_k2category.xml", finding:
<fieldset name="General Settings" label="General Settings" addfieldpath="/modules/mod_yt_k2category/elements">
<field name="width_module" type="text" default="700" label="Width of module" description="Width of module"/>
=>
<fieldset name="General Settings" label="General Settings" addfieldpath="/modules/mod_yt_k2category/elements">
<field name="moduleclass_sfx" type="text" default="" label="Module Class Suffix" description="Module Class Suffix"/>
<field name="width_module" type="text" default="700" label="Width of module" description="Width of module"/>
Thanks
