i'm currently using wallet "datacoin-0.8.6.0-linux" and it appears fine, bit slow to open, and very slow to sync compared to say Primecoin wallet. So i think the wallet needs some more optimising.
(I opened DTC and XPM wallets together, DTC was 39 hours behind, and XPM 6 weeks,,,,,DTC is still 11 hours behind, and XPM has synced)
We are currently on Datacoin Core 0.16.3 at the Datacoin repository on Github.
www.github.com/datacoinproject/datacoin.
Could you perhaps switch to 0.16.3 and help us with testing.
Thank you.
-extro