Any way to use the old blockfolio?
If you're using an Android device, your only option here is probably to find an old and untampered version .apk of Blockfolio, probably through Aptoide or something; which is something I really don't suggest as .apks online could potentially be maliciously modified by the uploader.
My suggestion would be mail them about the issues instead:
support@blockfolio.com ; as with the old UI? I doubt you could get them to revert to the old design.