.PSLC file extension is created by Patchou. .PSLC has been classified as Various data Files.
The PSLC file extension seems to have been in the past used for a package script files from Messenger Plus!. It looks like this *.pslc file type contains ZIP compressed scripts used in the 2007 version of the program. It is not clear whenever the latest version of Messenger Plus! still uses this file type.
How to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .pslc file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.