Q:The initial startup (trial) is working, but after entering the registration key(pdf2pdfa -$ "serial") it isn't working anymore.
A:If you want to get the full functional version of VeryPDF software, you have to pay for it on the website. Then you will get a registration code automatically. The code will be sent to your email box .If you use the CMD version, you can use the following way:-$ XXXXXXXX(registration code which can help you get the full function version of this software. ) If you just input pdf2pdfa -$ "serial", you can not get it work.