itch.io

Underneath the text box, in the middle, there's a faint white shape that you can click on to open a mini menu:

In the menu you click on the little key symbol:

It'll open up your inventory and then you just click 'Change Clothes'. You can also find Igon, there, for your eyes.

Had a similar problem, but there's an easy fix: right after leaving the dress selection screen, you go into your inventory and change to the dress you want, the reaction will run as if you bought it. Tested it with Lacey.