Hi TJ,
Unfortunately, deleting the Groove Binary File Store can cause irreparable
damage to your local Groove account. It is advised that you never touch this
file or else you will cause damage to your Groove data. The only way to
repair this is if you have your account on another computer and can migrate
that account and spaces over to the damaged computer.
You will want to run grooveclean –all first on the damaged computer before
migrating your account over from the second computer:
http://support.microsoft.com/kb/907854
Also, in the future, keep in mind that there is a hard 2 GB limit for
spaces. After 2 GB, you will not be able to invite new members and current
synchronizations might be negatively affected.
Gregg