Yeah, dropping in the modded script files it has to be, else you're effectively removing version26.rpy from the game. Though I did not follow the instructions to the letter – did not unpack the .rpyc files, as I wasn't going to make a save hence it being of no consequence whatsoever whether Ren'Py reanotated the AST or not (
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; for the technical inclined) – I still got it working without a hitch. Hm, if all went well you should have .rpy as well as .rpyc files for all scripts including version26 inside your game's game directory with version25's last label jumping to version26's first, (exactly) like this:
Python:
label endversion25:
if renpy.has_label('version26'):
jump version26