Dear Neurotic Fish

Thanks for your help...i am not sure what is going on .
I was trying to get Private Key for my Litecoin Address and wanted to move it from my PC LITECOIN WALLET to MAC LITECOIN WALLET but was not successful

When i wanted to get Private Key for my Litecoin Address I was getting the message that Private Key ..................................... is not know (code -4) whatever that means.

When i checked On Blockchain my balance it does say 87 what is correct amount.
I did try to send 2 transactions last week of 0.50 and 0.10 just to see would it work -it did not

Now i am really worried... i have tried to google it but could not find anything to do with this code -4.
Can it be because my Wallet is old? and i received  the message that "Alert Key Compromised, upgrade required"??


I will send you picture PM ..if you have time would be grateful if you can have a look.

Thank you so much..hopefully there is a solution for this

All the best
Alen