Transformation of content output from Storyline 1 to Storyline 360

Hi, In my organization, we are using SAP SuccessFactors as an LMS and Storyline-1 for content development since 2016. Now adobe flash is going to obsolete soon, I have bought Articulate Storyline 360. But the challenge is, we have lot of contents placed on our LMS and we also have output files for those content from storyline-1. Please suggest if these content packages need to be upgraded with Storyline 360 to avoided flash outputs and how can be upgraded with minimum efforts. I have already tried one content package (output from Storyline-1) to upgrade with storyline 360. But there were few slide, where contents and animations did not work or disappeared in Storyline 360.

Thank You in advance!