I’m using Windows 7, Audacity 2.1.2 I don’t know whether I obtained the .exe installer or the zip
I have saved projects in a folder and named them. When I select a file and click open, a subfolder name ‘e00’ opens, but I cannot reopen the project. : (
Open the AUP file you saved. You may see it listed in File > Recent Files top left of Audacity.
Leave the subfolders alone or you may damage your project.
Have a read of this FAQ: http://manual.audacityteam.org/man/faq_opening_and_saving_files.html#aufolder.