can't open lumira v1.23

hello,

i haven't used the software in a few days, but now i will not open.

it hangs during the open, when it gets to "preparing user interface", which is displayed at the bottom of the splash screen.

i let it sit for at least 5 minutes to see if it would respond, but nothing.

i've rebooted and tried selecting the "run as administrator" option, but nothing works.

i'm hoping someone can tell me how to fix what's wrong, or if i need to re-install this version.

i'm using windows 8.1, if it helps.

thank you

tracy