As there is a new Validation Framework introduced in v.2.0
The Validator classes are no longer generated by default. If you want them, you've to enable the task in the particular preset you're using and save the preset under a different name so you can later on re-use it.
Please consult the manual:
"What's new/changed in LLBLGen Pro v2.0?"
"Using the generated code -> Validation per field or per entity"