While in your place I would be reluctant to install the patch, but the problem may have been with the original install of 2014. If the original install was incomplete the installation of the patch may not have been able to install, locking the program.
I think I would use the program with a lot of backups. If no problems develop in a couple of weeks (months depending on your usage of the program) I would attempt the patch again.
Again on copies of my most recent data files. Many years ago I heard someone say using a computer was like being a good Baptist. You must save, save, save. ;-) including copies of your backups.