EU full client:



http://dl.wargaming.net/wot/eu/files/WoT_0.8.8_eu_install.zip

US full client:



http://dl.wargaming.net/wot/us/files/WoT_0.8.8_na_install.zip



SEA full client:



http://dl.wargaming.net/wot/sea/files/WoT_0.8.8_sea_install.zip

(partial 0.8.7 to 0.8.8 upgrade not available yet)