UGE - Universal Game Editor
This is a 1990s game editor that allows hex-editing of most save game files, but not all. (It is abandonware...)

It works in decimal numbering, handy when hexadecimal is not your forte.
You create Module, mdl, files that name and list the possible alterations. (Alternately, you may find the mdl files on the internet.)
Lst files are text files that give names and definitions for each variable in a given mdl file.

UGE won't run natively on Windows 10, but DosBox will run UGE normally.

(Create a folder called OldGames and put the UGE folder there. I assume the use of UGE10 for the UGE folder name.)
If you exited out of UGE, DosBox is still running and you want to restart UGE, just type UGE and hit Enter.

For an understanding of UGE, see the "UGE - FRUA Hacking" topic:
http://ua.reonis.com/index.php?topic=2404.0

For a copy of UGE, see:
http://frua.rosedragon.org/pc/misc/uge10.zip
This includes the module for Lands of Lore: Throne of Chaos. Modules for the other Lands of Lore games could be easily created.

UGE is generally useful for any game that does not have its own editor...