I often have the same problem.
To solve I usually just open the file and edit this to match the current
version of LyX.
I must be doing something wrong because you'd think the files would be
automatically upconverted but for some reason I have to manually edit
them, but it works.
On 3/2/2016 9:27 AM, Aron Toth wrote:
Currently I am using Lyx 2.1 on Windows 7 (Enterprise). I cannot open
old Lyx files. I can’t remember in which Lyx version they were edited
last, but the last time I edited them was two years ago… I would
really need to access these files, so your help would be much
PS: I am not a techy guy…