This software is an editor for replays files from Pokémon SM and Pokémon USUM. You can download the binary from here, or compile the source code from the GitHub repository. To edit a replay, drag and drop or browse your files with Windows Explorer to open the replay. Once opened, the replay settings are displayed. Then select the settings you want to change and modify them, then validate. Note that this software make you able to convert replays from SM into replays from USUM and vice versa.
If you encounter bugs or problem, please send me feedbacks from this page, via Twitter, or post a GitHub issue to let me know and make me able to update the software.