не надо отключать SEO, просто в файле russian.plugs.php (в папке /plugins/hwdvs-language/) замените соответствующие строки на
DEFINE("_HWDVS_SEF_FP","frontpage");
DEFINE("_HWDVS_SEF_VIDEOS","videos");
DEFINE("_HWDVS_SEF_EDITVIDEO","editvideo");
DEFINE("_HWDVS_SEF_FEATUREDVIDEOS","featuredvideos");
DEFINE("_HWDVS_SEF_VIEWVIDEO","viewvideo");
DEFINE("_HWDVS_SEF_CATEGORIES","categories");
DEFINE("_HWDVS_SEF_VIEWCATEGORY","viewcategory");
DEFINE("_HWDVS_SEF_GROUPS","groups");
DEFINE("_HWDVS_SEF_CREATEGROUP","creategroup");
DEFINE("_HWDVS_SEF_EDITGROUP","editgroup");
DEFINE("_HWDVS_SEF_FEATUREDGROUPS","featuredgroups");
DEFINE("_HWDVS_SEF_VIEWGROUP","viewgroup");
DEFINE("_HWDVS_SEF_YV","yourvideos");
DEFINE("_HWDVS_SEF_YF","yourfavourites");
DEFINE("_HWDVS_SEF_YG","yourgroups");
DEFINE("_HWDVS_SEF_YM","yourmemberships");
DEFINE("_HWDVS_SEF_CG","creategroup");
DEFINE("_HWDVS_SEF_RSS","rss");
DEFINE("_HWDVS_SEF_VC","videocategory");
DEFINE("_HWDVS_SEF_UPLOAD","upload");
DEFINE("_HWDVS_SEF_UPLOADEDP","videouploaded");
DEFINE("_HWDVS_SEF_UPLOADEDF","videouploadedflash");
DEFINE("_HWDVS_SEF_UPLOADEDB","videouploadedphp");
DEFINE("_HWDVS_SEF_ADDED","videoadded");
DEFINE("_HWDVS_SEF_NV","nextvideo");
DEFINE("_HWDVS_SEF_PV","previousvideo");
DEFINE("_HWDVS_SEF_DR","displayresults");
DEFINE("_HWDVS_SEF_SEARCH","search");
DEFINE("_HWDVS_SEF_VIEWCHANNEL","channel");