Please go to File>Utilities>Import and Export and from here you can see the option to to import master data from UBS Accounting or UBS Stock Control.
There is no way to import all the data from UBS to QNE Delphi. However, If you want to import opening balance by transaction type, Please go to File>Utilities>Import and Export>Import Master Data from other database then you can select DBase. Please take note that you can convert excel file to Dbase as well.
If you want to import daily accounting transactions to QNE Delphi. you may also doing it via File>Utilities>Import and Export>Import Data from Excel File, with this tool you are able to import the transactions from GL, AR and AP, but you have to convert the DBase into Excel file first.
You need to find out yourself which table from UBS database is refering to which transaction type.