I think you would find that users would help you through any problems that would arise but just backup your files before making changes then if something goes wrong eliminate the problem by restoring 1 file at a time.
I know its a pain but its what we have at the moment. 12-18 months wait for another new release is too long for Non-US users.
I would have thought the extra sales to non-us would have been ebough to warrant WA to have made the changes but my guess is that we can change it ourselves so they do not need to.
I would suggest you make any changes before you install that way everytime you need a licence to install just use the modded version after purchase you only make the changes once that way.