The most common "KDT" related save tool is the developed by KayDeeTee .
It looks like you’re searching for a save file editor for Knight Digital Theater (KDT) — likely the indie game Knight’s Digital Theatre (KDT), known for its visual novel / RPG hybrid mechanics and stat-based progression.
Ensure the game is completely closed before saving your edits. Saving while the game is running can cause file corruption or overwriting.
In visual novels like Katawa Shoujo (Ren’Py engine), .kdt files store:
: You can edit your Inventory (health, soul, geo, and items) and Charms (equipped status and notch costs).
: Set which charms are owned, equipped, and modify their notch costs. Save Management