Your modified action, script and keyboard shortcut bindings are in a reaper-kb.ini file. You can find that file at the root of Reaper resources via Options menu, Show REAPER resource path in explorer/finder. To be safe, it would be good to make backups of those configuration files (Options/Preferences/General, Export configuration).
In the reaper-kb.ini file, customized shortcut entries have KEY followed by two key numbers, then the action IDs. Mespotine has a list of all the keys in her Ultraschall pages here;
Reaper-KEY-Codes_for_reaper-kb_ini.
Welcome to the boards Ticiano.
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Kudos to mespotine for the big job of listing not just this but many other Reaper files as well.
https://mespotin.uber.space/Ultrasch...#Reaper-kb.ini