Hello,
Assuming you have updated to 11.0.3. The latest version for these modules is:
Accounts Manager module: => 11.0.3
Ads module: => 11.0.1
Antispam module: => 11.0.0
Events module: => 11.0.3
Nexus module: => 11.0.3
You can see this on the product sheet of each module by clicking on the "download" button. You can also see all the versions by clicking on the chevron.
About data loss I don't know, normally you shouldn't lose anything.