On your ESXi management console, restart your management agents. You shouldn't have to reinstall any of them. If they still don't come back, you can right-click and remove from inventory, and then browse the datastore you put them on, find the vm folder, right-click the vmx file and add-to inventory
-KjB
vExpert/VCP/VCAP
vmwise.com / @vmwise
-KjB