Yes, updates are provided for all 3.x versions and are lifetime. Currently, there is no higher version, but this may change in the future.

Yes, the program offers backup and restore features. You can read more in the help section: Backup and Restore.

The program is installed in the Program Files folder on the C: drive. However, your data is stored in the Application Data folder at C:\Users\username\AppData\SimpleInvoice. Note that the AppData folder is hidden by default in Windows.

Currently, network functionality is not available and there are no plans to add this feature in the near future.

No, multiple currency support is not available currently, but I hope to add this feature in the future.

No, Purchase Order functionality is not available yet. I plan to add it in the future.

No, printing payment receipts is not available. However, sales receipts can be printed.

Yes, the program offers import and export features. Currently, you can import/export products and customers. You can read more in the help section: Import and Export.

No, Simple Invoice works only on Windows. There are no plans to develop versions for other platforms.

Yes, but the translations in Simple Invoice were created thanks to other users. If you'd like, you can create a translation and I will add it to the program. Please contact me.

You can use the Backup and Restore option. Read more in the help section: Backup and Restore.

Yes, you can use a barcode reader with the software. Please read the Barcode reader topic.