Problem with Xposed on Lenovo K3 Note

I installed this rom VIBEUI_V2.8_1537_LTT_LEMONADE on my Lenovo K3 Note. After installation I understand that my Options don't work. I can't open Option. To fix that I must use Xposed installer, but I don't know what to do, because I never before use xposed. Please help! Sorry for stupid question and bad english.