Thanks Brianette. Both Alpha 27 and 28 appear to be ok now.
The problem was caused by the file brian.zip in the pioneer folder within documents. I don't know (or remember) how this file got there. The file date is 5/14/2012. Within this ZIP there is only one file "modulespioneer brian.lua", dated 5/13/2012. Is brian.zip required for anything?
(I haven't really played Alpha 28 today, but I could launch it and start from Earth.)
Yes, I did use this cheat, to get around a little bit more.
I like to play as an explorer rather than as a trader or fighter – and there are so many things to explore in Pioneer! It would be nice to be able to travel like, say, in Noctis where you can fuel up in "S06" systems. It shouldn't be too easy to travel around, but possible.
Had a bug report on ModDB about the search function in the Windows 20135.87 build. System Gliese 393 ( location 1,2,0 ) wouldn’t lock on after using the search. Cant say I have encountered this bug myself. More details (and my replys) in the comments below the downloads.