I can't uninstall LMMS properly

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Hello, today I've installed LMMS in spanish because I speak spanish, but now I want to change it to english, as it's the language I have all of my software on. I tried uninstalling LMMS from the control panel, wich executed the uninstaller in the LMMS folder, but when I install it again, instead of prompting me with the language and everything, only installs only asking me with the installation location. Can anyone help me? Thanks.
Within LMMS:
Edit -> Settings -> Language