How I tell the current version of my installed OpenMRS from inside OpenMRS ?
It’s on the system information page. Go to Administration (and then possibly Advanced Administration), then click on System Information.
Here is a link to the page on the demo site: http://demo.openmrs.org/openmrs/admin/maintenance/systemInfo.htm
Thanks Pascal this answered my question, I’ve googled for it and finally your answer helped me a lot.