Currently, I am using Multibit Classic 0.5.18
(I think there is an update to 0.5.19 but I'll be darned if I can find it)
(Also, I have a 32 bit computer and know of no 32 bit MultibitHD version or I would consider using that)

At any rate I have been using the Classic successfully until today when it said it could not load my wallet and was going to the backup and now it seems to just hang up synchronizing.

Please Help. Thanks.