Please take note when you export/import XML file, both database versions (Export and import) must be same.
Databse to be Exported :
1. Goto File -> Utilities -> Import and Export -> Export data to XML file
2. File Name -> Click 3 dots button -> Save As -> select the location, assign the doc name and save as type XML File -> Save
3. Click Master tab -> tick Stock, Stock Bundling, Stock Category, Stock Class, Stock Group, Stock Location, Stock Posting Acc Preset then click Export.
Databse to be Imported :
4. Goto File -> Utilities -> Import and Export -> Import from XML file
5. File Name -> Click 3 dots button -> Save as file select XML File -> Select the export file
6. In Master Tab -> Click 'Select All' Button -> Import