She has no regrets about rejoining the club and hopes to play for England again.
The former Manchester City, Barcelona and Atletico Madrid forward returned to her first club last summer amid talk of the Toffees potential to push for a top-three finish in the upcoming Women's Super League season.
The campaign that followed has seen them endure struggles that have led to two managers leaving and they currently lie ninth in the table with 17 points from 16 games.
I wouldn't say I have any regrets, according to the PA news agency. I wanted to help the club.
The fact that we are in a worse position makes me more motivated. I want the club to do well. I believe this team can get to the group stage of the playoffs, because I have been at the club when we were in the group stage.
The 30-year-old, on a contract to 2023, said: "This is home, I want to be here and I want to help the club." I will be here as long as they want me.
Chris Roberts has been in charge since Vasseur left at the start of last month and they will travel to Man City in the WSL on Wednesday.
They lost at home to Chelsea Women four days later, but prior to that they had won three games in a row.
On Sunday, they will face Man Utd on Sky Sports.
It is disappointing to be out of the cup, but we will review it and hopefully put things right for Wednesday.
It has been a tough season but Chris has done an amazing job. We needed a change of dynamic. It is about getting through the next building and fixture.
It was difficult to start the season and our confidence was low. In the first two games, we lost to both City and Chelsea, but they have been building those teams for years. We put together nine new players in the pre-season, and we knew it would take time. We lost Willie, then Jean-Luc came, and unfortunately things didn't work out with him as well.
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With the quality in the group, I am hopeful that we can turn things around. We have some of the best young people in the world. The future is bright.
The Lionesses haven't seen Duggan since March 2020 after she was part of England's campaigns at their last four major tournaments.
She said that if we aren't performing then she doesn't expect to be in the squad.
It's just about getting things right at the club and then hopefully I can go knocking on England's door when I have more to say.
The Goals for Girls initiative was launched by Fridays, which is a partner club.
The competition, open to anyone with an affiliation to girls football, will give away prizes including matchday experiences, on-pitch events and training session visits.
According to research by Women in Sport, participation in team sports at the age of 11-16 was 55 per cent for girls compared to 71 per cent for boys.
It is great that it is directed at girls. We need to reach out to the audience and give them the chance to meet the players. If you can't see it, how can you be it? It is a great initiative and I am proud to help spread the word about it.
For more information about Fridays, see Goals for Girls.