We have recently updated PESIM Central.
The new update no longer checks the placement of the xml addon which reduces the number of errors for those who have installed the scene or P3D on a disk other than C. However, we will no longer have this error as a clue that our xml file is badly placed for those who have P3D on a disk other than C and / or the P3D addons folder. Be sure to follow the procedures recommended in the user manual and forum for these specific installations.
The update is automatic, just click on install.
SMLXL