Hi Chris, 

thank you for getting in touch. 

Please find here the procedure to convert your files from version 10 into the new one:

1- Download WebSite X5 Optimizer from the following link:
https://www.websitex5.com/download/optimizer/1.10.0/WebSiteX5Optimizer_x86.exe
or
https://www.websitex5.com/download/optimizer/1.10.0/WebSiteX5Optimizer_x64.exe

2-Import  the project into  Optimizer

3- Choose the option "no optimization" if you are still going to work at the project

4-You will then be able to import the project in version 2022.2

Thanks! Kind regards.