go with SGminer 5.3.1 set the worksize to 256 and intensity 22-23

Read the post just above yours, you'll get your answer, or the first post of this thread....

Mutual Coin is on our pool.

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stratum+tcp://hashpool.co.za

mutual coin   MUT   scrypt   hashpool.co.za   Port: 1116, Diff: 0.1 Port: 2227, Diff: 1 Port: 4449, Diff: 1000

Payouts every 10 mins once block is confirmed

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HAPPY MINING
THE HASH POOL TEAM

Shut down wallet. Restart. If, after loading, it says 'the blockchain was corrupted; do you want to rebuild?', say yes and let it re-sync (will take a few hours). If it loads but again gets stuck, easiest to just manually re-sync. See Q1 & Q2 below.

https://forum.pivx.org/t/faq-for-wallet-issues/878

Your wallet.dat isn't affected by any of this, but best to back it up anyway.

I'm re-downloading the blockchain as I got an error when updating to the latest wallet.  Did anyone else get that error?

30$+ for sure. I'm estimating a 80-100$ by end Dec