Zegnåt’s multi-level navigation. ‘Menu Master.’ (version 3., 20100519)

[nikifor]

I have Get-Simple 2.1 and download your plugin.
When I put the folder into plugins folder this plugin is not appear in Plugins section of Admin Panel.
When I use in my template function menu master and enable debug mode was fatal error calling to undefined function.
How I must install and call your plugin? solutions from previous replies is not working.