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FYI,
IBM have just released Data Studio 4.2.0 to address multiple vulnerabilities in the old versions.
https://www.ibm.com/support/pages/node/7258315?myns=swgother&mynp=OCSS62YD&mync=E&cm_sp=swgother-_-OCSS62YD-_-E
It is a separate install, not an upgrade. I don't think there are any functional improvements, just the security update.
To save you hunting for it, here's the link to Fix Central:
https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~Information+Management&product=ibm/Information+Management/IBM+Data+Studio&platform=All&function=all
Cheers