vanagandre, i suddenly got a problem where my wallet was no longer working/wouldnt synch suddenly out of the blue, i was using a BTCD wallet version from maybe 3 months ago or so, i followed these same steps in the OP, backed up my wallet.dat and downloaded and ran the new client (put the copy and paste .conf file in the app roaming directory) and boom it started working again no problem. thank god.
i have no idea why it stopped working in the first place, but after opening it and letting it load and get stuck at the same place for a week or so, i thought alright, i better have a look and do something to get it working right, even tho theres no reason i know that broke it in the first place. following the instructions in the OP under wallet sync problems exactly sorted the problem. i know you said you have done this and it didnt work, so you want any other solutions, but id say give it one more try and be 100% that you follow the instructions to the letter.(if it still doest work, i hope someone else can help you, and m sure they will if they can, good luck!)
and have a nice night.
(p.s. this is my first post ever!)
(p.s.s. im quite drunk! but i think that made it even more urgent that i helped if possible, someone else who was trying to used this excellent, yet to be realized coin)
to the future!