The importexport utility provided at no charge with AyaNova can import and export clients, units and parts (see more details in the online Help documentation starting with http://www.ayanova.com/AyaNova7webHelp/what_is_the_clientimportcsv.htm ).
We do not provide a utility to import/export service workorders, etc.
No, you can not export back and forth your data entries/updates between multiple AyaNova databases.
What you will want to do is configure one or more of the remote access options for AyaNova so you can access your live AyaNova database from anywhere.
Besides providing access to you when you are at home, also prevents problems exporting and importing including loss of data, overwriting of data, forgetting to import, etc.
Do note too, that the AyaNova Data portal is provided at no extra license charge - set up as per the online Help documentation starting with http://www.ayanova.com/AyaNova7webHelp/what_is_the_ayanova_data_porta.htm