On the Windows client, in "Manage Solutions", selecting a save from a previous related puzzle and clicking "Upload For Myself" crashes the client. For example, in 822, I attempted to upload a solution from 819. An unhandled exception appears in log.txt, and a Windows error report pops up. Nothing appears in stdout or stderr.

A workaround is to load the solution, then save the solution again under a new name. After that, the solution can be uploaded normally.

The client should either issue an error message in this case, or automatically adjust the solution to allow it to be uploaded.