Make sure you update the version in all of the EnergyPlus input file.idf files referenced.

For example, in the .ini you could have two idf files in there:

Simulation { Files { Template { File1 = singleZonePurchAir_template.idf; } Input { File1 = singleZonePurchAir.idf; } Log { File1 = singleZonePurchAir.err; } Output { File1 = singleZonePurchAir.eso; }

In which case you'd need to modify the singleZonePurchAir.idf and the singleZonePurchAir_template.idf.