Hi I saw this thread when trying to find out what happened to the Tracklogs site and signed up to respond. I have been a user of Tracklogs over ten years. Several years ago as a 50th birthday present to myself bought the entire collection of maps - well over 600! - for the princely sum of £240, which worked out at about 40p a map. I have the full installation program for the map viewer that came with that, version 3.18.02, which appears to be the latest version, even though it is dated 2013. I can confirm that the installation still works and does not check with tracklogs.co.uk that the licence key is valid. I am happy to put this on my Google drive for anyone who wants to install the map viewer to gain access to the maps they have already purchased. I can confirm also that the map viewer works fine with version 1909 of Windows 10 with the exception of the 3d maps which won;t use my GPU.
I am pretty ****** off that they just shut down the site with no explanation, which is pretty shoddy behaviour. The least they could have done is put up some bromide web site saying that owning to business circumstances they must wind up the company and thanking their customers, yadda, yadda, yadda.
I consider it to be a brilliant product and I used it all the time to plan walks all over the UK. But clearly its price model wasn't going to work any more. On my iPad and iPhone I have installed GPS Outdoors which for a subscription of £19.99 a year gives me all 600+ OS 1:25,000 maps. Its functionality is inferior to Tracklogs but then it is a mobile app so I can actually take it with me on walks. I do not regret buying Tracklogs and will continue to use it for as long as I can continue to walk or the maps become too outdated to use. I have an archive of a few hundred walks so it will be used for many years to come.