How can I switching between pools?

Under the Pool menu, select switch pool, then from the available pools, select the desired pool.

Important - When a pool is restored, if there is any legacy configuration information on any of the scanned drive, an empty pool can be created (in addition to the pool containing all the drives). This could mean that the interface may not display any drives if this empty pool is selected. To fix, simply switch to the correct pool as described above, you can then delete the unwanted pool (tip: you rename the empty pool by clicking on the pool's name within the interface, this will prevent any confusion).