ISX is in the best company league in Australia and Europe.It's a...

ISX is in the best company league in Australia and Europe.
It's a shame they are listed on ASX. Of course due to circumstance in their origins, it was logical for ISX to be listed on the 'cowboy casino'.
It's unfortunate they didn't drop ASX for Frankfurt only, but then again many of us holders probably wouldn't have been exposed to this great company.
So, besides the profitable, cashflow positive, cash on hand type of growth company ISX is, what else do they need to get a listing on a good exchange?
Can they just drop ASX and stay listed in Germany ? Or will they need to drop them too and start over ?