jeffh - this might be moot as the updates come out for Paratext, but in general, if you need to uninstall a particular update (like .69) in Windows, you must go to Control Panel > Programs > Programs and Features > Installed Updates and look for the updates that you want to uninstall. In my case I would need to remove several levels to get back down to .67.
Note that if you have automatic updates turned on in Paratext then Paratext will continue to download the updates. You can choose not to install it, but sometimes they sneak through. So it would be better to turn off the automatic update in that instance. Hopefully the full release of the fix for the icu problem will be out soon.
Blessings,
anon848905
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