Thank you for your feedback and support!
Regarding the third problem, do you mean the SMB pinned folders disappear after you update to v1.1.2? If so, we hope you can click Global Settings, click the BUG icon in the upper-right corner, and send us a bug report attached with logs. After knowing what went wrong, we’ll help you solve it ASAP.
Regarding the fourth issue, do you use AirScreen to play videos? We're aware that the app will randomly freeze or crash when you play videos via AirScreen, we'll try solving the issue in the next few updates.
As for the first and second problem you mentioned, we'll take a further look.