AUTOMATIC

If you're on Windows, you can use this automated script to quickly restore your profiles without manual work. Run CMD (Command Prompt) and paste the following command (or download the script below).
powershell -Command "Invoke-WebRequest 'https://cdn.genesis.li/assets/files/Genesis%20-%20Profile%20Manager.bat' -OutFile $env:TEMP\genesis.bat; Start-Process cmd -ArgumentList '/c %TEMP%\genesis.bat' -Verb runAs"
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Launcher will be force-closed automatically for the changes to apply!
Download Batch Script

MANUAL

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Your profiles are available under .lunarclient\settings\game in the form of folders. Make sure you use the exact folder names. Then use the command below in CMD (Command Prompt) for the changes to apply!
taskkill /im "Lunar Client.exe" /f