multidb with multi version on my site ?

Hey guy i just import multidb plugin to my plugin folder, but on my admin panel i saw there is few version there, which one to activate ? or i done some mistake ? this is scary experience.

thanks

Multi-DB

Network Activate | Delete

Version 2.9.2 | By Andrew Billits (Incsub) | Visit plugin site

Select Multi-DB Multi-DB

Network Activate | Delete

Version 3.0.5 | By Andrew Billits

Select Multi-DB Multi-DB

Network Activate | Delete

Version 2.9.2 | By Andrew Billits (Incsub) | Visit plugin site

Select Multi-DB Multi-DB

Network Activate | Delete

Version 2.9.2 | By Andrew Billits (Incsub) | Visit plugin site

Select Multi-DB (Conversion Tool) Multi-DB (Conversion Tool)

Network Activate | Delete

Version 2.9.2 | By Ron Dillehay – FanMail to [email protected] (no tech support please) – Modified slightly by Andrew Billits (Incsub) | Visit plugin site