SyncTrayzor won't start

[appraiservt-stack]

I am having an issue with SyncTrayzor no loading on both my local computer and my remote computer.
Both are running SyncTrayzor Version 2.1.0
Both machines give me the following error as soon as I try to start them:

Failed to start Syncthing.

Please read the log to determine the cause.

If "FATAL: Cannot open database" appears, please close any other
open instances of Syncthing. If SyncTrayzor crashed previously, there
may still be zombie Syncthing processes alive. Please use the menu
option "Syncthing -> Kill all Syncthing processes" to stop them, then
use "Syncthing -> Start" to start Syncthing again.

OK

In the log window at the bottom of the error page on both computers is this:

2026-04-23 18:42:53 INF Saved log output (path=C:\Users\appra\AppData\Local\Syncthing\syncthing.log log.pkg=main)
2026-04-23 18:42:53 INF syncthing v2.0.15 "Hafnium Hornet" (go1.25.7 windows-amd64) builder@github.syncthing.net 2026-02-11 10:41:38 UTC (log.pkg=main)
2026-04-23 18:42:53 ERR Failed to initialize config (error="config file version (52) is newer than supported version (51); if this is expected, use --allow-newer-config to override" log.pkg=main)
2026-04-23 18:42:53 INF Saved log output (path=C:\Users\appra\AppData\Local\Syncthing\syncthing.log log.pkg=main)
2026-04-23 18:42:53 INF syncthing v2.0.15 "Hafnium Hornet" (go1.25.7 windows-amd64) builder@github.syncthing.net 2026-02-11 10:41:38 UTC (log.pkg=main)
2026-04-23 18:42:53 ERR Failed to initialize config (error="config file version (52) is newer than supported version (51); if this is expected, use --allow-newer-config to override" log.pkg=main)
2026-04-23 18:42:53 INF Saved log output (path=C:\Users\appra\AppData\Local\Syncthing\syncthing.log log.pkg=main)
2026-04-23 18:42:53 INF syncthing v2.0.15 "Hafnium Hornet" (go1.25.7 windows-amd64) builder@github.syncthing.net 2026-02-11 10:41:38 UTC (log.pkg=main)
2026-04-23 18:42:53 ERR Failed to initialize config (error="config file version (52) is newer than supported version (51); if this is expected, use --allow-newer-config to override" log.pkg=main)
2026-04-23 18:42:53 INF Saved log output (path=C:\Users\appra\AppData\Local\Syncthing\syncthing.log log.pkg=main)
2026-04-23 18:42:53 INF syncthing v2.0.15 "Hafnium Hornet" (go1.25.7 windows-amd64) builder@github.syncthing.net 2026-02-11 10:41:38 UTC (log.pkg=main)
2026-04-23 18:42:53 ERR Failed to initialize config (error="config file version (52) is newer than supported version (51); if this is expected, use --allow-newer-config to override" log.pkg=main)

I have no clue on how to fix this. I do see a statement about (error="config file version (52) is newer than supported version (51); if this is expected, use --allow-newer-config to override" log.pkg=main)

I looked all over for these settings and cannot find them. If this is something I need to do at the Command Prompt I need some guidance on how to do this. I am somewhat non-technical and need something that is as much as possible "step by step".

I would appreciate any help offered.

Thank you.

[GermanCoding]

For some reason your syncthing version was downgraded from 2.0.16 to 2.0.15. That shouldn't happen and I've no idea how it did happen to you in the first place.

With the slightly older syncthing version it won't start as it finds a config from a newer version. You need to upgrade your syncthing version (not SyncTrayzor, but syncthing) to 2.0.16 as it was before.

There are several possibilities how to proceed. One option is to manually upgrade syncthing to its original version, as follows:

1. Stop SyncTrayzor entirely
2. Download syncthing v2.0.16: https://github.com/syncthing/syncthing/releases/download/v2.0.16/syncthing-windows-amd64-v2.0.16.zip
3. Unzip syncthing.exe and move it into C:\Users\appra\AppData\Roaming\SyncTrayzor\syncthing.exe. Make sure to replace the exe file that already exists at this location.
4. Start SyncTrayzor again

[appraiservt-stack]

That worked. Thank you for taking the time to help me out. Very much appreciated!