I want to make some changes but there is no "editor" in "appearance". How can I get it?
Where can I find wp security plugin??
If you have installed it thene you can find it in your wp-admin -> plugins-> installed plugins .
Sorry - but there is no WP security plugin installed. Can I use any plugin or is there a special one for WPLMS?
Can you please try deactivating all third party plugins(plugins except Vibe WPLMS plugins) and check if this helps.
If this does not help try switching theme to the default wordpress theme and check if Editor appears now.