Are you sure the application was actually installed? To me it sounds like what you see on your desktop is only the extracted installer - which hasn't operated (installed WL8) yet.. And, for helping here, it is essential to know more about your system; OS & version, 32 or 64 bit, etc..
--- "If anyone owes it all to Bach, it's God" - Emil Cioran ---
SOFT: (All 64 bit) | WaveLab 8.5.20 | Cubase 7.5.40 | HALion Sonic 1.6.3 | Win7 Pro - SoundCloud
HARD: i7-950 | Asus P6TD | 30GB | Tascam DM-3200 | DigiMax48 | Midisport 8x8 - SoundByte Studio