NB should open what was open last time it closed normally. If it
terminates unexpectedly it should still open what was open at the last
normal close. If you close NB normally and it does not open correctly what
was open when you closed, it should be reported as a bug -- especially if
it is reprod
Happened to me second time.
My Windows machine restarted automatically due to installed system updates.
When I restarted Netbeans, it did open projects I worked on, but over a dozen
source files were not reopened.
It used to open those files, although, in 8.2 a bug was introduced that opened
not