FLSM IS NOT THE APP YOU ARE LOOKING FOR!
If you are a new customer, the FL STUDIO MOBILE App you are looking for is here -
https://apps.apple.com/app/fl-studio-mobile-hd/id432850619
FLSM is an obsolete App, still being updated to support the original customer base. Its priced ridiculously high so you dont buy it ;)
MANUAL / SUPPORT / TRAINING / VIDEOS
http://support.image-line.com/redirect/flstudiomobile_help
http://support.image-line.com/redirect/flstudiomobile_videos
TROUBLE-SHOOTING & ISSUES
Please help us to help you! In the App, tap Help > Users & Support Forums to register FL Studio Mobile to your Image-Line account and gain access to the forum. You can then report bugs, make feature requests and access free downloadable content:
http://support.image-line.com/redirect/flmobile_forum