Convert Code Signing CER to PEM

I purchased a new code signing certificate from K Software and I was able to get the CER file, but I need to convert this to a certificate in PEM format and the key in PEM format. Any suggestions?

You can google for the openssl command line to do this.

e.g.
https://sslhow.com/convert-cer-to-pem

I’m quite sure that if you can’t follow these instructions you don’t have the private key.

I would expect that’s the case because the CAB now requires that the private key be stored on a dongle. CA/Browser Forum Updates Requirements for Code Signing Certificate Private Keys - Entrust Blog