Appears to be always using the DIM0 directory, regardless of what "[XP] null OW Dim Dir" is actually set to.

Using:

XaerosWorldMap_1.30.6_Fabric_1.20.jar
Xaeros_Minimap_23.5.0_Fabric_1.20.jar
XaeroPlus-Fabric-1.20.1-13-WM1.30.6-MM23.5.0.jar

on Minecraft 1.20.1 / Fabric 0.14.21

Resolved in:

• Fabric 1.20.1: 4d5f914
• Forge 1.20.1: a4a32ef

thanks for reporting!