What is the recommended process for switching between standalone mode and nginx?

[begunfx]

I am currently running Synology's internal nginx reverse proxy and am running acme.sh in standalone mode. I would like to install nginx proxy manager and issue the certs using the nginx mode. My question is: What is the recommended process in removing the existing certs and then re-issuing them but using the nginx option? Should I just remove them from DSM and blast the cert files manually then run the issue command again? Or can you just force renew the cert with the nginx option?

Thanks!