You can often restore them by right-clicking the tab area and clicking on reopen closed window.
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Scribble Hub Forum
Maple-Leaf
Didn't work 
Nahrenne
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There's also the option to reopen closed tab.
Keep doing that and your 100+ tabs should be back eventually...one tab at a time.
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X
There's also the option to reopen closed tab.
Keep doing that and your 100+ tabs should be back eventually...one tab at a time.
'-'
X
Maple-Leaf
The option to reopen is greyed out and it won't let me do it
My condolences.