C1 iPad crashes continuously - what a poor piece of software

I used C1 iPad for the first time during my three weeks Japan visit. I took over 2100 shots with my GFX50SII and my XT5. C1 iPad crashed during processing and working on the shots every 5-7 pictures. It was really a mess. I returned back home last night to learn, that also the EIP export does not work. C1 iPad crashes every time I try to export more than a handful of pictures.

Cloud sync is ridiculously slow. 

So, I´m trapped. I worked on more than 2000 files and cannot export the RAWs with adjustments. Any idea? How can software which claims to be intend for professionals can be so bad?