After upgrading from 1.9.0 beta i receive many of those errormessages when i press "find duplicates"
(see image attached)
i use the 64-bit version. the similarity executable was called Similarity64.exe before, now it's just Similarity.exe even for the 64-bit version.
My link in taskbar still pointed to the (after upgrade still present) Similarity64.exe which called the newer Decoder.exe, hence the errormessage.
It is fixed now, just wanted to post if someone ran into the same problem