Wilcom has a free program, TruSizer that you can use to do minor edits, sizing and you should be able to save your design for your Janome quite easily. There are YouTube videos but it is quite an easy program to navigate.
https://www.wilcom.com/Products/T...
Yikes! Can you split the design and do it in two hoopings? If you have a friend that has a different program, maybe she could save it for you in the size you need.
You may have to consider gettting a different software programs that allows you to use bigger designs.
I have SWP and I love it. Just wish it could work on my iPad.
Sorry I have Embird and cannot comment on Sew What Pro. Hope someone can give you some help. Leaning a new programme at times is difficult believe me I understand.
I have used "sew what" for a long time but it will not do a bigger than 5x7 in the correct hoop lines. It will transfer the correct format from any other format which is nice and will let u see your designs even if they are still zipped. put I am sure the upgrade will do more.