Been coasting on progress with Westside's for Skinny Bastards

I started working out again after injury 8 months ago. I've been doing Westside's for 3 years and started the same work out plan. I've been making steady progress for 4 months, but the past 4 months I barely made any progress. My bench has been at a stall for the past 4 months at around 195. I work out alone, so I don't have any spotter. I'm not exactly sure what is causing me to stall. I get enough sleep, and I've been bulking.

I haven't really done any deadlifts or squats until 2 months ago because of my knee injury from bad squat form.

Should I switch up my workout program? I'm working out for strength, but I also have to run 3 to 4 times a week because I am in the ROTC. What work out program would be suited for me if I want to go to the gym only 4 times a week?