We can add "-J-Dpkobskde.support.same.as.pk3=true" to the IDE "default_options" in ../v3.xx/mplab_ide/etc/mplab_ide.conf, it will make the PK3 device support as the default for PKOB.
PlatformToolMeta.java
/**
* This method should only be called if the user passed the following
* option to the IDE: -J-Dpkobskde.support.same.as.pk3=true
*
* The user is telling the IDE to treat the PKOB SKDE platform tool meta
* as if it had the same device support as PK3.
* We do this to allow APPS to test a new PKOB SKDE without having to
* change the PKOB SKDE xml deviceSupport element.
*/
