Cannot Open .osp file "invalid load key, '{'."

[BakiHanma18]

I seem to be having an issue opening this file (see attachment) in OpenShot Video Editor. This is my first occurrence of this issue, so I did not have a backup prepared. I have gone into a Binary Code Editor and removed all the empty space (all the zeroes at the end), however, I find myself completely lost as to what I should do next. This was quite a large project, so I hope to hear good news and as soon as possible! Thanks in advance.