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I installed sitecore form extension- http://onelittlespark.bartverdonck.be/sitecoreformsextentions/9.1/developerdoc/install.html#configuration. But now my form does not get saved. Any idea to rollback or default to sitecore forms?
I do not wish to delete the files and items manually. Below is the error I get while saving the form 
I installed this and then removed it as well. The code is easy to remove and the items are fairly isolated. I found the root item paths by looking at the package and installed over them (overwrite) from a clean install of sitecore. Packaged from the clean install and installed in my install. That reset everything, but I had to get the right item paths first.
Sitecore doesn't provide an automated way for removing installed package using Installation Wizard. You can only remove packages manually if you have not created any anti-package using Sitecore rocks before installation. - Uninstalling sitecore module
If you don't have anti-package then the only way is to follow steps described here - https://kb.sitecore.net/articles/916660
Sitecore PowerShell Extensions comes with the anti-package feature as well - https://doc.sitecorepowershell.com/modules/integration-points/toolbox
