This conversion looks mostly related to transformation of bitmap pictures from Sun Raster format (.scr) to standard JPEG format (.jpg, .jpeg). Should be doable in most graphics editors, sadly SCR format is not that well supported in modern programs, so you usually have to use some older ones.
Convert Sun Raster bitmap image file to JPEG bitmap image format.
We have found 2 software records in our database eligible for .scr to .jpg file format conversion.
Microsoft Windows software - convert scr to jpg on Windows
A complete image retouching program
Convert from scr file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned scr to jpg. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Multiplatform software - convert scr to jpg on any platform
A popular utility for viewing and converting graphic files