三百編程軟件,STEP 7 V5.5歐洲版的,安裝用了一年都沒(méi)有問(wèn)題,現(xiàn)在突然出現(xiàn)許可證過(guò)期,打開軟件時(shí)彈出“No vaild license key found.The application will be closed",沒(méi)辦法,我只能從新安裝一下軟件,當(dāng)加密狗裝上以后,顯示“There are no license keys saved on this crive"如何解決呢,不會(huì)從發(fā)到西門子哪進(jìn)行一下授權(quán)吧