You might be getting this question a lot, but I tried googling first and nothing works.
I am trying to set up an Ethereum Wallet locally, but everytime I run the client I get the Checksum error, and it's prompting me to manually install an older version of Geth (1.8.23).
Steps (I did the same with Ethereum Wallet and with Mist; all installations are on a separate drive than C:)
A. Separate geth and Ethereum Wallet / Mist
I installed geth first, then started it with a bat file which points to the correct chain data folder.
I downloaded the wallet client, unpacked the ZIP and started the client.
The checksum error pops up, asking me to manually install geth 1.8.23
B. The all in one Ethereum Wallet / Mist installer which also lets you choose the chain data folder for geth
Installed the client, pointing the two folders.
I start the client and he checksum error pops up, asking me to manually install geth 1.8.23
C. I went to "C:\Users\x\AppData\Roaming\Ethereum Wallet\binaries\Geth" to replace the geth .exe, but I can only see an archive there and not the "unpacked" folder, so I can't really replace the .exe.
I don't know at this point what I am doing wrong, it just won't work...