crash- cannot run QT anymore at all

SoulseekQt.exe caused an Access Violation at location 7c912669 in module ntdll.dll Reading from location fffffffd.

Registers:
eax=00000005 ebx=003e0000 ecx=003e0000 edx=003e0608 esi=003e0178 edi=000007ff
eip=7c912669 esp=0022cbb8 ebp=0022cbbc iopl=0 nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00200202

Call stack:
7C912669 ntdll.dll:7C912669 _stricmp
7C912882 ntdll.dll:7C912882 _stricmp
77C2C3C9 msvcrt.dll:77C2C3C9 free
77C2C3E7 msvcrt.dll:77C2C3E7 free
77C2C42E msvcrt.dll:77C2C42E malloc
6578B88E QtGui4.dll:6578B88E _ZN7QBitmap5clearEv
6578B800 QtGui4.dll:6578B800 _ZN7QBitmap5clearEv
655F3846 QtGui4.dll:655F3846 _ZN16QTreeViewPrivate6layoutEibb
655F5251 QtGui4.dll:655F5251 _ZN9QTreeView13doItemsLayoutEv
655F15B9 QtGui4.dll:655F15B9 _ZNK9QTreeView14verticalOffsetEv
655B507E QtGui4.dll:655B507E _ZN17QAbstractItemView15setCurrentIndexERK11QModelIndex
65622AB7 QtGui4.dll:65622AB7 _ZN11QTreeWidget14setCurrentItemEP15QTreeWidgetItemi
65622AE8 QtGui4.dll:65622AE8 _ZN11QTreeWidget14setCurrentItemEP15QTreeWidgetItem