Hi,
When there are errors in the console, indeed playmaker will not be visible (as well as many other assets)
As it can not startup when there are errors.
What (red) errors do you get when vuvoria package is installed?
Did you install vuforia?

If you wish to uninstall:
I checked the package and i can see that it also used 'playmaker Utils'
try removing this folder also.
If you get different errors (probably if you used some other packages like array maker for example) after removing this.
Then re download that package.
BUT before you do anything
make a backup from your projectMany games has been already produced with Playmaker (even well known games like Heartstone from blizzard) , so you don't have to worry about that
