All the dashboards and web dashboards by default stores on the location %AppMon_Directory%\server\conf\dashboards which we mostly take care during migration.
I guess you can simply save as the dashboard and then change the source > session of that dashboard.
Have a look on the below link for the Export and import web dashboards and Import AppMon Client dashboards to AppMon Web.
Are you asking about the client dashboard or Appmon Web dashboards. If your ask is for client dashboards, you can save the dashboard locally which will create the .xml file and you can import/open the same file to the another system profile which will work eventually.
Answer 1: you can simply change the source of the dashboard and save as the dashboard according to your naming convention, as multiple system profile might be created on single appmon server.
Answer 2: if you want to export the dashboard to different servers system profile which is on configured on diff client machine.
Step 1: Saving the dashboard locally on My Computer as xml file by default
2) Copy the .xml file to the desktop on which the target client version is installed, Open the dashboard and select the .xml file and save it by configuring the source details.