You can find the current version by selecting the help icon
then from the menu of options
Select About JIRA and this should show you a screen similar to the following
It is worth noting that this also gives you the version numbers for all the plugins installed as well as JIRA.
This has nothing to do with this question. I'd suggest searching the docs and here for the answer (Atlassian has a standard doc for "run atlassian applications with SSL", so start with a search for that), and asking again if you get stuck when following those docs.
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