Use 7-Zip to unzip the file.
Customer downloaded the ESRS vApp. The file ESRS_VE.x86_64-1.1.14.ovf.tar.gz. was verified against the MD5 hash (FE506E9AF2D7B8D133DD8EC26EC8A4D7) as correct.  But, when trying to deploy the OVF in vSphere, he got an error stating the OVF signature does not match its content.  Customer decompressed the tar.gz file twice and got the same error in vSphere.
error deploying ESRS vApp on vCenter