Alas, with a new version of the wallet, but the problems are old. after synchronization of the wallet with the old wallet.dat, the wallet crashes
Goto your old wallet
/ Settings / Consoletype:
dumpprivkey your-wallet-address
save your privkeyopen the latest Martex Wallet
/ Tools / Consoletype:
importprivkey your-privkey
and wait full sync.
OR
If you already have the latest Martex Wallet in your PC
Goto
Tools / Repairwallet / Recover Transactions 1 (-zapwallettxes=1)