The Version “AS3.0_AR_V0300_PP400.exe” is part of the Installation of AS_3.00.80.0025
Unfortunately this version is no longer in the B&R Download available.
If you have access to a local installation copy, you can get it from there. “\Setups\AddOn”
If you don’t have access you can ask your local B&R Sales to provide it (Standard procedure in such a case), or give me a Personal Message with your Mail contact.