“How to add "FILTER WORKS" filter below theme menu (or any other widget) ?”
1. Create sidebar via theme settings admin -> general -> sidebars e.g called ''my sidebar and save theme settings!
2. Go to wordpress widgets page and drag and drop Division Portfoloio Filter Widget ( or any other widget/s like search or categories ) into newly created sidebar "'my sidebar".
3. Create new page, add content to it e.g via page builder add portfolio module or blog and search for Primary Sidebar settings in Page Appearance box -> assign "my sidebar" -> save and publish