If you are using the new versions, you could find the Version option at the top of the editing window. Please click it to check the version number:

For old versions, please refer to the following steps:
If you are using Filmora for Windows, follow below steps:
Step 1: Open Filmora and Go to Help About.
Step 2: A window will pop up showing the version number.
If you are using Filmora for Mac, follow below steps:
Step 1: Open Filmora and Go to Wondershare Filmora- About Wondershare Filmora.
Step 2: A window will pop up showing the version number.
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