I also got this below I tried to verify it with the sha256sum.txt.asc from releases but got this error below
gpg: not a detached signature
edit:
Since the error above gpg not a detached signature I tried to edit the sha256sum.txt.asc and remove the hashes or the whole PGP signed message and save only the PGP signature and this is the result below.
gpg: key 8C5211764922589A: "goatpig (Offline signing key for Armory releases)
gpg: Total number processed: 1
gpg: unchanged: 1
C:\Users\Test1\Downloads\Programs\New folder>gpg --verify sha256sumsignature.txt.asc armory_0.96.5_win64.exe
gpg: Signature made 24/12/2018 4:16:07 pm Malay Peninsula Standard Time
gpg: using RSA key 8C5211764922589A
gpg: BAD signature from "goatpig (Offline signing key for Armory releases)