Directory Opus shows back slash in the address bar as separator, but in many program languages use slash as separator, so how do I modify to let Directory Opus shows slash in the address bar?
Opus uses backslash for Windows paths and slash for FTP and SFTP paths, since those are what’s canonical/correct. There isn’t an option to change it.
If you need to copy the paths with forward slashes for copy-pasting purposes, you could create a custom button that does it.
For example using the Clipboard COPYNAMES REGEXP <someregex>
https://docs.dopus.com/doku.php?id=:reference:command_reference:internal_commands:clipboard
clipboard copynames=unc - backslash
Clipboard COPYNAMES=unc REGEXP (.*)\\(.*)# \1/\2 - slash