Windows explorer crashes on copying files

Looking at the crashdump with Windbg.exe (which is part of the Debugging Tool for windows/Windows SDK) shows that psdprotect.dll from EgisTec MyWinLocker 3 causes the crash:

0:048> !analyze -v
*******************************************************************************
*                                                                             *
*                        Exception Analysis                                   *
*                                                                             *
*******************************************************************************


DUMP_CLASS: 2

DUMP_QUALIFIER: 400

CONTEXT:  (.ecxr)
rax=0000000080004005 rbx=0000000009f269f8 rcx=0000000000000000
rdx=0000026500560124 rsi=0000000000000048 rdi=0000000000000000
rip=00000000100012db rsp=000000000c6eeb80 rbp=0000000009cbb628
 r8=0000000009d0a250  r9=0000000000000002 r10=0000000000000000
r11=0000026400500123 r12=00000000ffffffff r13=0000000003c02220
r14=0000000000000000 r15=0000000000000001
iopl=0         nv up ei pl nz na po nc
cs=0033  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010206
psdprotect+0x12db:
00000000`100012db 488b01          mov     rax,qword ptr [rcx] ds:00000000`00000000=????????????????
Resetting default scope

FAULTING_IP: 
psdprotect+12db
00000000`100012db 488b01          mov     rax,qword ptr [rcx]

EXCEPTION_RECORD:  (.exr -1)
ExceptionAddress: 00000000100012db (psdprotect+0x00000000000012db)
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 0000000000000000
   Parameter[1]: 0000000000000000
Attempt to read from address 0000000000000000

DEFAULT_BUCKET_ID:  NULL_POINTER_READ

PROCESS_NAME:  explorer.exe

ERROR_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%08lx verweist auf Speicher 0x%08lx. Der Vorgang %s konnte nicht im Speicher durchgef hrt werden.

EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%08lx verweist auf Speicher 0x%08lx. Der Vorgang %s konnte nicht im Speicher durchgef hrt werden.

EXCEPTION_CODE_STR:  c0000005

WATSON_BKT_MODVER:  3.1.72.0

MODULE_VER_PRODUCT:  MyWinLocker

APP:  explorer.exe

ANALYSIS_VERSION: 10.0.10586.567 amd64fre

THREAD_ATTRIBUTES: 
OS_LOCALE:  DEU

PROBLEM_CLASSES: 


NULL_POINTER_READ
    Tid    [0x1ea0]
    Frame  [0x00]: psdprotect


STACK_TEXT:
00 ntdll!NtWaitForMultipleObjects
01 KERNELBASE!WaitForMultipleObjectsEx
02 kernel32!WaitForMultipleObjectsExImplementation
03 kernel32!WerpReportFaultInternal
04 kernel32!WerpReportFault
05 kernel32!BasepReportFault
06 kernel32!UnhandledExceptionFilter
07 ntdll! ?? ::FNODOBFM::`string'
08 ntdll!_C_specific_handler
09 ntdll!RtlpExecuteHandlerForException
0a ntdll!RtlDispatchException
0b ntdll!KiUserExceptionDispatch
0c psdprotect
0d psdprotect
0e shell32!CFSDropTargetHelper::_MoveCopyHIDA
0f shell32!CFSDropTargetHelper::_Drop
10 shell32!CFSDropTargetHelper::s_DoDropThreadProc
11 shlwapi!WrapperThreadProc
12 kernel32!BaseThreadInitThunk
13 ntdll!RtlUserThreadStart


00000000`10000000 00000000`10026000   psdprotect   (export symbols)       psdprotect.dll
    Loaded symbol image file: psdprotect.dll
    Image path: C:\Program Files (x86)\EgisTec\MyWinLocker 3\x64\psdprotect.dll
    Image name: psdprotect.dll
    Browse all global symbols  functions  data
    Timestamp:        Thu Aug 06 19:13:12 2009 (4A7B0F28)
    CheckSum:         00029240
    ImageSize:        00026000
    File version:     3.1.72.0
    Product version:  3.1.72.0
    File flags:       0 (Mask 3F)
    File OS:          4 Unknown Win32
    File type:        2.0 Dll
    File date:        00000000.00000000
    Translations:     0409.04e4
    CompanyName:      Egis Technology Inc.
    ProductName:      MyWinLocker
    InternalName:     PSDProtect.dll
    OriginalFilename: PSDProtect.dll
    ProductVersion:   3.1.72.0
    FileVersion:      3.1.72.0
    FileDescription:  PSD DragDrop Protection
    LegalCopyright:   Copyright (C)2008 Egis Technology Inc. All rights reserved.

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