This is a problem, because it breaks forum and external links into V5 API that contains a lot of help and people are going to be reading and using it for many years of V5 product lifespan to come.
Please, switch back or generate old docs package, if possible, which may be easier than writing the script that redirects all old addresses to the new locations.
The API help system was overhauled as the old system was convoluted and difficult to read (unless you were experienced with base Doxygen outputs) and also had not been updated in almost a year.
The new system at VEX Help will be maintained moving forward in a more sustainable way.
We’ll see what we can do about the old links, however continuing to point to old content is not advisable as it may be outdated compared to the current SDK.