tested latest Windows wallet 1.5.2, seems to solve masternode.conf crash issue

Rebuild linux wallet and downloaded 1.5.2 for win. Win wallet still crashed with masternode.conf file.
It could be due to I started the masternode first through command prompt of interzoned & interzone-cli, then stop interzone-cli & open windows qt wallet
This seems to be true.
I started my MN via the interzone.conf settings, by adding the following lines:
masternode=1
masternodeaddr=[[IP-OF-MASTERNODE]]:55675
masternodeprivkey=[[PRIVATE-KEY]]
Then started the wallet, and via the command line I stared the MN by entering: masternode start
Then close the wallet, configure your masternode.conf file and start the wallet.
Maybe the wallet will crash if the configured masternode (in your masternode.conf) is not in the list of Masternodes yet. As once it has been started it's working fine.