Please help us help you and fill where relevant:
Your LimeSurvey version: 6.16.3
Own server or LimeSurvey hosting: No (using web version)
Survey theme/template: None
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Hi all,

Apologies, a really dumb question here: I have created a .lss file (in XML) for import into LimeSurvey, but can't for the life of me find the "Import" option/tab anywhere. I am not able to import a .lss anymore? Do I need a paid subscription now?

Kind regards,
Stu

It's a modification: you need to click on +/Import now

I prefer previous behavior (in fact, 3.X behavior is perfect)
bugs.limesurvey.org/view.php?id=20188
 

Thanks for the quick response Denis.

I don't see a "+/Import" option anywhere on the webpage?

I attach a screenshot, no matter which "New"-style button I press, they all create a brand new, empty, survey. As far as I can tell, there is no "Import" option?

On the top left of your screenshot is the LImesurvey logo, to the right of this is a + sign (white on purple), click it. This will give you the option to create a new survey, copy a survey or import a survey. Go for import.