I understand this airline has now been grounded by Greek Aviation Authorities
Not true. Aircraft was on ground for a day or so while routine checks by Greek CAA were carried out in the wake of the Helios crash. These checks are being applied to all airlines.
Alexandair has been cleared - minor "bureaucratic" issues pointed out, paperwork unsigned, etc - but otherwise the carrier has been given the OK.
Flights resumed 21 August and airline is operating normally.