Welcome back on board.
I had been an avid PB user from v1.73 to v3 and then stopped using it for five years. When v4 came out I was very surprised because I thought that the development of the personal version had stopped. But I was wrong.
I decided to start with the pro version even the price was huge for me. But I am a satisfied PB v4.5 user since June this year and the investment was worth of it.
I feel the same excitement like during the v1.73-v3 days. PB is the most efficient and effective tool I have used so far and believe me: I have tested and used countless other PIMs and outliners.