[Vpmedia]

you overwrote the 'buttons' file with the Cant 1007 or the Night Mossie install, you should have skipped that file

try to restore the original, I havent got the UltraPack but its location should be something like : 'C:\Program Files\Ubisoft\IL-2 Sturmovik 1946\MODS\_SOUNDMOD\gui\game\buttons'