Cannot export private key

[PSLLSP]

I cannot export private key from this wallet. I can only save some proprietary key store to the disk. Only AION desktop wallet can read this keystore file. Will it be able to read this file in the future? Is backward compatibility guaranteed?? Backup of my wallet in binary file scares me...

Anyway, this is one of the most user un-friendly wallets ever I tried, I do not like it and I use it only because I cannot find anything better for AION coin. I would like to have backup of private key to be able to migrate to other wallet or use some web based wallet; I will migrate ASAP I will find some better wallet and for this I will need private key....

BTW, AIWA web wallet can import and export private key. Unfortunately, this is the only positive thing I can say about AIWA wallet; it looks like MetaMask wallet but is difficult to use it, so I do not like it.