The patch looks OK. Did you do a full Power Off/On after you finished making all your changes?
If this doesn't fix it please post screenshots showing:
- the contents of your .kobo/dict directory, specifically the 2 entries for
dicthtml-e2.zip
dicthtml-i2.zip
- the Dictionary table of the Kobo database showing the 2 entries for
-e2
-i2
i.e. your equivalent of steps 4 and 5 from post #1.