You can test the latest stable release. Or visit the repository to download most any version. Ignore virus warnings and allow it to proceed.
If the project refuses to load, try loading a previously saved VPJ file. Do a PC search for VPJ. A likely place is the folder that contains the source files.
Save Project File AS routinely, giving it a unique # or name, so as not to overwrite prior saves. Using Save Project Files (no AS) will overwrite. From the HOME tab, the AS choice is available by clicking the caret to the right of the Save Project button on the toolbar. That way you're protected, and shouldn't lose anything.
If the project still refuses to load, please zip and upload all files in the source directory (folder) for inspection. Here's how...
Upload the file/s to a free server, such as Google Drive or MS OneDrive, right-click the link and Share or Copy. Copy the result and paste it here or to me in a Private Message via the mail envelope in the top-right corner of this forum. When using Google Drive, click SHARE | SHARE and change "restricted" to "anyone with link can view.**