As a workaround you could use the ST3 sounds in ST4 (even the free ST4 Custom Shop). But that will not help your existing projects.
As this is primarily a user to user forum, someone-else may chip in. But please remember that the same symptoms do not necessarily mean the same problem.
Meanwhile, the best thing to do is
Search the FAQs first, via here. If they do not resolve the issue, there is a
red button link to the Technical Support form, for some one to one investigation and help. Response time aims to be within 2 working days (US (East Coast) Business hours, generally), but in the current circumstances please allow some more time.
And, to help others who run into a similar problem, please let us know what you did to resolve the problem. Please do not quote directly any correspondence from Support, as that may apply only to your particular circumstances and may lead others down the wrong track.
