That name ending in "...dll.exe" does not seem to me like the right filename for a main application. Is there another file present, perhaps that ends in "...magick.exe" as your previous version did? Just wondering if the former might be some sort of updater / installer.
Also are you using export presets at all? If so those would also need to be updated suitably.
Belonging to the random button pressing club for solving problems I have finally sussed it!
According to the download site the dll versions are the right version
Most of the issue was that I have a whole load of export presets which clearly all needed individually re aligning with imagemagick. This also gave me the opportunity to cull 7/8ths of the export presets that I just don't use. Thanks
Glad you got it sorted. Managing workflow via named presets is generally a great thing IMO - even if that does add something extra to manage. But personally I feel the 'sweet spot' when it comes to presets of any kind, is to maintain just a tight, small team of those - that fully earn their places, and that you can stay fully on top of.