How to change the hardware type of a virtual appliance

How can the hardware type of a virtuel appliance be changed?

The hardware type depends on the configuration of ram and cpu that of the virtual appliance.

Here is a list of all hardware types in combination with the configured ram and cpu values:

Type Ram CPU
RX50_VM 0.5 GB / 512 MB 1 CPU
RX100_VM 1 GB / 1024 MB 1 CPU
RX250_VM 2 GB / 2048 MB up to 2 CPU's
RX500_VM 3 GB / 3072 MB up to 2 CPU's
RX750_VM 4 GB / 4096 MB up to 2 CPU's
RX1000_VM 5 GB / 5120 MB up to 4 CPU's
RX1500_VM 6 GB / 6144 MB up to 6 CPU's
RX2500_VM 8 GB / 8192 MB up to 6 CPU's

To change the cpu/ram settings, the appliance needs to be shutdown at first.