Welcome back to the playing fold! Bowing is definitely a difficult thing to get back in check after a break – I found the same thing when I returned to playing. The suggestion above is the same thing I tell my students. The mirror is your best (and worst) friend when working on straight bows.
Another tip I’d add is to play long bows on each of the open strings. The bridge angle contributes some toward bow direction depending on how high or low your elbow is while playing. Keep a metronome ticking along while playing whole, half, quarter, and eighth notes. Especially on the longer durations, think: push away from your body on down-bows, and bring it ever so slightly back toward the body when coming back up.