Remove pam background

Download and install the latest version of Filestar.
Right click on one or more Pam file(s) on your desktop and select Convert with Filestar.
Type remove background in the search box.
Press Run.

What is .pam?

Name: Portable Arbitrary Map
Extension: .pam
Format: Binary
Category: Raster Image
Developer: Bryan Henderson
Description: The PAM image format is a lowest common denominator 2 dimensional map format. It is designed to be used for any of myriad kinds of graphics, but can theoretically be used for any kind of data that is arranged as a two dimensional rectangular array.
MIME Type: image/x-portable-arbitrarymap[3]
Sample: sample.pam
Wikipedia: .pam on Wikipedia