I have downloaded test command line version, but when I click on it in Windows Explorer getting following error (Also can not use .exe in Batch file),
If testing goes well, we are planning to purchase Developer Edition.
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It seems something is wrong in your download package, it is maybe caused by network problem, please re-download it from following URL again,
https://www.verypdf.com/encryptpdf/encryptpdf_cmd.zip
VeryPDF