The new version introduces a few commands: all can be used via console, some via RCON. All of them will need admin status.

cheat ScriptCommand AC ItemAdmin - Opens the GUI for changing item settings - No RCON
cheat ScriptCommand AC FoundationRadius <radius> - changes the minimum distance between foundations of non-allied tribes and players
cheat ScriptCommand AC TribeXPShare <faktor> - Changes amount of XP given to tribemembers, default value of 0.5 = 50%
cheat ScriptCommand AC LoadItems - Reloads the item database
cheat ScriptCommand AC LoadSettings - Reloads global settings (currently only FoundationRadius)
cheat ScriptCommand AC SaveQuantity - Manually collect and save quantities of modded item stacks

All settings are stored in multiple files inside the Saved/SaveGames directory as .sav files.

They are:
ArkCustomizerItems.sav - Database of item changes
ArkCustomizerSettings.sav - Database of global settings changes

These files can be copied to multiple installations or shared with other people. A tool for external editing might come too. And of course you can prepare you settings in singleplayer, upload them to your server and then use a command to load them into the running game.