The X-Cart v4 to v5 Data Migration Wizard add-on migrates data from an XC4-based online store to X‑Cart 5.
You can find general instructions on the add-on installation in Installing Add-ons from X-Cart App Store.
The add-on can migrate almost all types of X-Cart 4 data to X-Cart 5. See the complete list of data being transferred here.
It also performs the overall check of your X-Cart 4 store environment and recommends the add-ons you should enable in X-Cart 5 to match the functionality.
This way, after a data transfer, you only need to adjust your store’s look and feel, install the missing add-ons and configure the settings that are not present in X-Cart 4.