.PLSC File Extension
File TypeMessenger Plus! Live Script File
What is a PLSC file?
Script written for Messenger Plus! Live, an add-on for Windows Live Messenger; adds extra functionality to the Windows messaging program; may also allow Windows Live Messenger to interact with other programs.
Messenger Plus! scripts can be downloaded from the Messenger Plus! Live website.
NOTE: Windows Live Messenger was discontinued in 2013 and has moved to Skype.