I'm having the same problem as the ones described in:
I have checked that my Jobs & Experts plugin version is 18.104.22.168 as mentioned in post #1.
I have also verified that the "If you want these demo jobs to have sample files, check this box." checkbox was unchecked before I click Submit in the "Create dummy data for jobs" form, as recommended in post #2.
I have also tried to deactivate all other plugins and to switch to a default theme.
...I still cannot see any job in the Manage jobs section, despite Job categories and Job skill tags have been created correctly.
Thanks for your help!