We upgraded to V4 on 3/12/13 which is when our database of about 4000 users was transferred over. We then realized we also needed to upgrade Moodle, which took us until now to get finished up. So - our V4 of Member is almost 2 months out of date - we have hundreds of registrations that did not get transferred from V3 during that month. Is there an easy way to do this? I see Rebuild Core Database and Rebuild Invoice Database. I worry about overwriting all the work I have done in aMember the last week - doing Integrations, etc. What's the easiest and safest way to transfer the missing files from V3 to V4?
You should run import again. Go to /amember/admin-import3/, use "clean up" to delete all users/payments/invoices from your amember v4 database, then reimport everything from amember v3.