I have a site which has an older version of the Workflow app, and I would like to update the app so that I can use the new responsive designer for task forms in a workflow I'm currently building. This site already has a list and a workflow, with multiple workflows in progress, and it's unlikely there will be a time when there aren't any workflows running on that list.

Will updating the Workflow app - which in the past has always required me to remove the app and then re-add it - impact any of these running workflows, and if so, how can I work around this? Also, are there any other concerns I should be aware of? Previously I've only updated the app on new sites which haven't had workflows running.