Modifications are saved in an application layer which is also specified in the configuration. All modifications to application objects in a layer are saved in a file named ax
If that case you have the other way. For example you need to dispose everything that was made on VAR and USR layers.
Open the AOT and create a new project, e.g. LayersVarUsr
Open it and use Advanced Filter/Sort tool on the toolbar or Ctrl-F3
Check AOT and open Inquiry form by clicking Select button
Here you should set the rule for utilLevel field, in our case VAR..USP to include all modifications made on these layers with patch ones as well.
Be patient, it can take much time. When the DAX finishes you will get everything to accomplish your seek-and-destroy mission.
By the way, you can take advantage of using Compare tool to decide what will next happen.