Cannot update my lightning node

[d4amenace]

After following all of the steps to update/install lightning. I find that my node is refusing to update due to an earlier install that created a "permanent" v0.12.01 on my machine. Uninstalls do not work and reinstalls just give the same version. Here are the steps i received from an issue here that installed this version 12 permanently:

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Installing C-lightning from Binaries

Get dependencies:
apt-get update
apt-get install -y
jq autoconf automake build-essential git libtool libgmp-dev libsqlite3-dev
python3 python3-mako python3-pip net-tools zlib1g-dev libsodium-dev
gettext
apt install snapd squashfuse fuse (only for proxmox lxc container)
python3 -m pip install --upgrade pip setuptools
python3 -m pip install --user mrkd mistune==0.8.4

If you don't have Bitcoin installed locally you'll need to install that as well. It's now available via snapd.
apt-get install snapd -y
snap install bitcoin-core
ln -s /snap/bitcoin-core/current/bin/bitcoin{d,-cli} /usr/local/bin/

Clone lightning:
git clone https://github.com/ElementsProject/lightning.git
cd lightning

For development or running tests, get additional dependencies:
apt-get install -y valgrind python3-pip libpq-dev
python3 -m pip install -r requirements.txt --use-feature=in-tree-build

Build lightning:
./configure
echo -e '#!/bin/sh\ntouch $2\nexit 0' > /usr/local/bin/mrkd
chmod 755 /usr/local/bin/mrkd
make && make install-program

run lightningd (to get the .lightning folder created)

lightningd

How can I remove and update?