Attached below is the beta of the 3.4.3 version of the Membership plugin.
I'm trying to get as many bug fixes as possible complete for the full release of this version, so will be releasing a few betas on this thread as we go through.
If you currently have a thread open on the forum with a bug report then please try the version below and let me know if it helps (or more importantly doesn't help).
Note: The front end interface for the coupons functionality isn't showing in this first beta as I still have a few little changes to make to re-introduce it, but it should be back in for a future beta release (hopefully in a day or two at most).
Update: Coupon functionality is back in as of beta 4