Updated to iTunes 11.1.2 in Windows 8.1, now iTunes won't launch.

Every time I try, Windows just tells me "iTunes has stopped working." Checking online doesn't return any results (as expected). I've tried restarting and launching in safe mode - still not working. Any ideas?

Here are the problem details Windows gave me:

Problem signature:

Problem Event Name: BEX

Application Name: iTunes.exe

Application Version: 11.1.2.31

Application Timestamp: 52627a31

Fault Module Name: atiumdag.dll_unloaded

Fault Module Version: 9.14.10.945

Fault Module Timestamp: 5117090e

Exception Offset: 00054420

Exception Code: c0000005

Exception Data: 00000008

OS Version: 6.3.9600.2.0.0.256.48

Locale ID: 1033

Additional Information 1: 1136

Additional Information 2: 113617799a723215eac2e684cadee0b6

Additional Information 3: 1ada

Additional Information 4: 1ada05a4ec51c5056922c10920f103a7

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