Si, avevo provato a pulire ma.... TROVATO!
Era in Form1.it.resx
codice:
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AAABAAEAEBAAAAEAIABoBAAAFgAAACgAAAAQAAAAIAAAAAEAIAAAAAAAQAQAAAAAAAAAAAAAAAAAAAAA
AAD///8A////AP///wD///8A////AP///wD///8A////AP///wD///8A////AP///wD///8A////AP//
/wD///8A////AAAAAQAAAAEAAAABAAAAAQAAAAEAAAAA/wAAAP8AAAD/AAAA/wAAAQAAAAEAAAABAAAA
eccetera eccetera.....
7f8AAAD/AIAA/wCAAP8AAAD/AAABAP///wD///8AAAAA/wCAAP8AgAD/AIAA/wCAAP8AAAD/6ent/+np
/wD///8A//8AAPw/AADwDwAA4AcAAMADAADAAwAAgAEAAIABAACAAQAAgAEAAMADAADAAwAA4AcAAPAP
AAD8PwAA//8AAA==
</value>
</data>
Sorry per il disturbo...