Yes, it happens sometimes.
Did you delete following folders after uninstall:
1) C\Program Files (x86)\ubuntuone
2) C:\Users/User\AppData\Local\ubuntuone
3) C:\Users\User\AppData\Local\xdg
Delete these folders after uninstll, then install again and see if some results.
Yes, it happens sometimes. User\AppData\ Local\ubuntuone User\AppData\ Local\xdg
Did you delete following folders after uninstall:
1) C\Program Files (x86)\ubuntuone
2) C:\Users/
3) C:\Users\
Delete these folders after uninstll, then install again and see if some results.