Use git

but the integrated Git function is still disabled on OMEdit, isn't it? Or that is not what you ment?

Simply use command-line git from the operating system. It is really simple to use. No git integration only means you need to remember to add new or moved files, etc.

Are you talking about the update of the free libraries or the changes of the model you developed by yourself ?
I use the Github desktop app on Win10 and create a fold to save models developed by myself, The "history" tab will show the modifications ever made.
You can also check the free library on git in the same way.

hope this could help you.

Best,

@Mingzhe37: Thank you for the suggestion. But i'm looking for more offline solution. If i understand it correctly, you still need to connect to internet when using GitHub Desktop even if your repo is in local. But I might be wrong tho.

I'll try martin's suggestion for now using gitforwindows and meld, and see if it is sufficient for my need at the moment.

Cheers