Hi guys
In early 2014 I bought lightcoins and as the price did not grow I forgot about them.
Now I found the wallet file (litecoin.dat), but I can not remember what wallet I used at the time.
Electrum ltc writes "can not read file"
Litecoin core writes "file is too big"
How can I restore access?
There aren't that many litecoin desktop wallet's (AFAIK, i don't hold many LTC's). Since it has a .dat extention, my first instinct would be to re-try litecoin core... Maybe you could post the last couple dozen lines of your debug.log, or just move the debug.log, try to open the client using the litcoin.dat as wallet file (so a new debug.log gets generated), close the client again, then upload the full debug.log, so we can have a look at what's happening.
Another usefull tool is db_dump, this tool allows you to dump berkeley db files, altough encryption might mess up the end result...
Just in case you're running linux, it might also be good to try the command "file litecoin.dat". At least it will tell us what kind of file we're dealing with.