Hi Florian
Try to avoid MTC with HAANA and use MCOD instead.
In most of the cases a new Install of the BI-JAVA is easier than Export/Import/Upgrade.
See the following Document for Details - Fresh Install SAP BI-Java 7.30 - Options, Connectivity and Security
The Informations didn´t changed for 7.40/7.50 for the Implementation. for more Informations see the SCN Page
SAP BW Application Lifecycle Management (ALM)
Best Regards Roland