Open a project, and then open the schematic that you wish to modify.

Click: File -> Run Script and select RunRenumberComponents

As shown below

Click OK and the following window will then open:

“Net Name (without Number)” is the net name which defaults to RL. This will need to be modified as required such X for an X net, or Y for a Y net etc. Enter an increment value and this will increment all net with the same designator suffix that you have entered. The increment can also be a decrement by entering a minus value, e.g. -16, but care should be taken that the value does not take any net names to a negative value. It should also be noted that this script will not work with bus names.