DP STBL Editor is a Stand-alone STBL Text String editor for Windows. It was created in VS 2012, which I believe uses .Net 4.5.
This utility was designed primarily for helping people that need to do a lot of translations for mods like mod creators or translators. It has the capability of bringing the STBL file directly in from a package file, which should help translators who may not have experience using S4PE to extract the STBL files for the language they wish to update.
It has other functions built-in like importing changes from XML files or exported STBL tables as XML and comparing two STBL files to generate an XML file with the differences between them.
This utility uses the standard S4PE naming scheme for opening or saving “.stbl” files. Really, you don’t have to worry about all of this unless you’re generating a new STBL. The program will handle it for you.