Welcome back a123!
Someone had said in the old thread that the 0.4 release got stuck several times while redownloading the blockchain. But that should be solvable. May be related to what zodiac3011 has posted.
Think all the previous contributors have access rights to that git, so that might be a useful point to start:
https://github.com/gjhiggins/Slimcoin/. Bugs can be reported directly to the git, then most of the previous contributors will get a ping so it might kickstart something again?
Yes, if we use gjhiggins/Slimcoin as the official repo, then bugs ideally should be reported there directly. I'll update the first post of the thread accordingly.
Some good news: On Reddit, user smith7800
has announced a 20.000 SLM bounty for "a working windows wallet".