Here!:
- Go to your app data folder in Windows (C:\Users[Your Username]\AppData\Local). If you can't find it, make sure you can see hidden folders. You can also type %LOCALAPPDATA%/ into the explorer bar to do the same.
- Delete the folder "nwjs".
- Go inside the folder 'User Data". Then go inside the folder "Default". Look for the files "Web Data" and "Web Data-journal". Delete these two files.
- In the app data folder, Go to Kadokawa\RPGMV\User Data\Default. Look for the files "Web Data" and "Web Data-journal". Delete these two files.