Hello @gero

To move QloApps, please perform the following procedure: https://webkul.com/blog/move-prestashop-to-new-server/.
As QloApps is built on PrestaShop, The procedure to move QloApps to another server is similar to that of Prestashop.

Note: Do not forget to take the backup of files and database. So that in case any issue occurs, you can rollback to the previous state.