Vigurs was an integral part of the County engine room which propelled the Dingwall side's rise to the Premier League.
He shone for Well on Saturday, though, and has no doubts about where his loyalties lie now.
He said: "It is a great result, especially after the results we have had lately. It was a good bounce back.
"We were maybe a bit shaky in the second half, but it was going to happen as County were going to have a go at home. I think we deserved our win."
Vigurs also had a word of encouragement for his old side who sit second from bottom after John Sutton's brace got the job done for the visitors.
"They have added some good players and maybe they have not gelled so much so far. They have a good team and I think they will do okay.
"I enjoyed my time here and had some great seasons here. But I am at Motherwell now and we got a good victory."
County's Kevin Luckassen, who made a big impression after coming off the bench and set up County's goal, said: "We started well and we were unlucky but after that Motherwell scored two goals.
"If we start games like we played in the second half we will make it impossible for every team to win like that.
"In the second half we started really well, I don't know why we did not start like that in the first half."
Luckassen is still waiting for his first senior goal - something his side could do with - but he is trying to stay positive.
"I did well with the assist for Melvin De Zeeuw, but in the end we lost," he said.
"The goals are going to come, I don't have to worry and think: 'Goals, goals, goals'.
"I know it will come, there are a lot of games and I know I will score. It is hard, it is my first year as a professional and I still don't have my first professional goal.
"I have to keep going and I know it will come. I know I can score. You have to keep going as it will come. I trust in my own qualities and the goals will come.
"I am not worried about what people will say. The team is also not doing that well, it is also hard."