Add the rule in:
Code:
Settings > Advanced Settings > GeneralSettings.domainrules
Rule:
Code:
[ {
"domainPattern" : ".*zippyshare\\.com",
"filenamePattern" : null,
"accountPattern" : null,
"pluginPattern" : null,
"enabled" : true,
"maxSimultanDownloads" : 12,
"allowToExceedTheGlobalLimit" : true
} ]
Modify the "maxSimultanDownloads" value as required.