@Kevin_Z 

I had installed the beta firmware ax50v1_intel-up-ver1-1-0-P10[20201013-rel33896]_noRadarDetect.bin which fixed the DFS channel issue.

Recently, there is a new firmware for AX50 https://static.tp-link.com/upload/firmware/2021/202109/20210909/Archer%20AX50(US)_V1_210730.zip

I would like to install this firmware due to the new changelog of

----------------------------------------------------------------------------------------------------------

Bug Fixed:
1. Fixed the FragAttacks vulnerabilities;
2. Updated the version of the Dropbear and fixed some Dropbear vulnerabilities;
3. Updated the version of the OpenSSL and fixed some OpenSSL vulnerabilities.

----------------------------------------------------------------------------------------------------------

However, when I tried the Local Upgrade method, I keep on getting "Unable to upgrade firmware".

I believe it is caused by version numbering issue after comparing previous firmwares numbering :

ax50v1_intel-up-ver1-0-11-P1[20210730-rel54485]_signed ---> would like to install this.

ax50v1_intel-up-ver1-1-0-P10[20201013-rel33896]_noRadarDetect  --->this is currently installed.

ax50v1_intel-up-ver1-0-9-P1[20200708-rel55037]_signed  ---> these 3 below are old firmware version

ax50v1_intel-up-ver1-0-8-P1[20200426-rel65338]_signed

ax50v1_intel-up-ver1-0-7-P1[20200407-rel54193]_signed

At first, I tried TFTP recovery method, then I realized AX50 doesn't support TFTP.

So, how am I suppose to upgrade or downgrade to different firmware version for AX50 after I flashed the BETA firmware, @Kevin_Z ?