I have exact the same problem here.
So, we have to wait for a new patch?
I have Visual Studio 2010 Edition of Dotfuscator CE (Version 5.0.2500.0) and have downloaded the patches from here (DotfuscatorCE5Patch5.0.2600.msp and DotfuscatorCE5Patch5.0.2601.msp)
Neither of these patches will apply though. I get an error message:
The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded may be missing or the upgrade patch may update a different version of the program
This is on WinXP x86 SP3 and Win 7 SP1 x64. Both installations of Visual Studio are patched with Service Pack 1.
Is there another patch that I need to apply first?
[Edit - Resolved]
I have a workaround:
Reinstall VS2010 in a XPx86 VM, patch, then copy the patched files out. Urgh.