Those who purchased downloads from the Friends of Wetlooker site prior to it re-emerging as the Amateur section of Wetlooker are probably confused by the resultant change in download codings. This summarises the changes:
Old codes fr0001 thru 0483 are now c140 thru 622 respectively;
Old codes fr0500 thru 1745 are now c623 thru 1868 respectively;
Old codes fr1747 thru 1783 are now c1869 thru 1905 respectively;
Old codes fr1787 thru 3886 are now c1906 thru 4005 respectively.
The numbers of new download codes now match the number of the set.
Hoping it helps!

Have to admit I have never got to grips with their coding of sets. As such I have downloaded two sets twice!!! But it is a fabulous site and the sets are very good value. Just needs care if you want to download older sets.