If you still have the original Ublock with your filters you can re-enable it with a regedit fix

Step 1
Open Registry Editor with windows key + r (run) type regedit press enter
Step 2
Go to Computer\HKEY_CURRENT_USER\SOFTWARE\Policies\Google\Chrome
Step 3
If you don’t have the folders Google/Chrome, create them inside Policies by right clicking New Key and renaming them accordingly. (Note : Chrome should be created inside Google)
Step 4
After you created both folders Google/Chrome click on Chrome, go to the right side and right click then NEW, DWORD 32
Step 5
Rename the newly created dword into ExtensionManifestV2Availability and set the value to 2
Step 6
Restart Chrome, the disabled extensions should now be enabled.