Unpack the archive into any directory, run the exe file and then either create a save from scratch (which is not recommended) or load a previously saved game into the editor (make a backup copy first)
+the ability to change ME 1 events
+the ability to change the player’s BIO as well as add resources, credits, squad points and hero / renegade points
Mass Effect 2: Save Editor {2.5} [RUS] Free Download
Spoiler
Places where it makes no sense to translate since it is clear what was written there were missed, as well as what was not clear due to too strong abbreviation or simply incomprehensible content, either missed or partially translated, so far a more correct translation is not planned. I also want to note the translation was done for home use and just provided for review.