Version Problem

I have 2 problems the first of which stops me from being able to submit correct logs

I have an Ubuntu server on which I was running Sonarr V3 but then had upgraded to V4. Everything was running perfectly with V4, until I had a power failure. When I rebooted my server and accessed localhost:8989 V4 ran but it could no longer see my root folders.

I restarted the machine as well as Sonarr, the one root folder came back but not the others that had been set up and working. I Checked to folders and they are available manually so they were not damaged with the power drop.

Tried the restart process again and now when i run localhost command only V3 starts up and I cant access V4 - or more correctly I dont know how to.

Please assist with firstly being able to remove/disable Sonarr V3 so that only V4 runs then I will be able to access V4 and provide the logs to see why it is no longer seeing my root folders.

Apologies but I am not an expert on Ubuntu or Sonarr and have not been able to find a solution to this.

Version
3.0.10.1567
Mono Version
6.8.0.105
AppData directory
/var/snap/sonarr/common
Startup directory
/snap/sonarr/334/Sonarr
Mode
Console

First google result for “uninstall snap package” says sudo snap remove <package> and you can use snap list to find the right name of the 3rd party sonarr snap package.

thanks for that, but I have tried that with no success. Used “snap list” to identify the package name and version. Used the “remove” command and the following error returned “E: Unable to locate package sonarr”

have now been searching for other solutions but nothing working.