The store-area element of a Twine 1.x created story HTML file has a different structure to that of a Twine 2.x created story HTML file, and unfortunatelly the Twine 2.x application currently doesn't know how to process the data structure of a Twine 1.x created story HTML file.
Nor does the Twine 2.x application support any of the story formats (Sugarcane, Responsive, & Jonah) that come pre-installed with the Twine 1.x application, so even if the Twine 2.x application did understand the older data structure you would only be able to import story HTML files that were built using SugarCube (1 or 2).
There are a couple of options available to convert a SugarCube (1 or 2) based story HTML file that was created using Twine 1.x:
1. The Twine 1 compiled HTML to Twine 2 archive converter utility listed in the Utilities section of the main page of the SugarCube 2.x website.
2. The TweeGo TWEE compiler.
You could use the -d (--decompile) option to convert the Twine 1.x story HTML file into a TWEE file, and then either use the -a (--archive-twine2) option to create a Twine 2.x archive file or use the compiler to create a Twine 2.x story HTML file.
You can then use the Twine 2.x application's Import From File option to import either of the above two files.