When applying for a Code Signing Certificate, some certification authorities allow you to generate the CSR either yourself, on your own server or during the ordering process in the browser. If you have opted for the last option, please note the following.
The application and the “ pick-up “ of the Code Signing certificate should always be carried out in the same browser.
To then export the Code Signing Certificate from the browser, please proceed as follows:
Menu -> Settings -> Advanced -> Certificates -> Show Certificate -> Your Certificates -> Select Certificate > Export
Menu -> Settings -> Advanced Settings -> HTTPS/SSL -> Manage Certificates… -> My Certificates -> Select Certificate > Export
Extras -> Internet Options -> Contents -> Certificates -> Own Certificates