What OS, how did you perform the install and did you load the new version to new directories/folders or install over the 6.2.28 ones?

Bill P

Edit type and looked at subject

This is a "feature" of the v6.2.xx-client, that it always seems to move the data-directory to the BOINC program-directory on uninstallation, even if the uninstallation is part of upgrade-process.

v6.6.xx and later clients doesn't move data-directory on uninstallation, so you won't see the problem on later upgrades...


But anyway, if you've not re-attached yet, it should be fairly easy to recover your data:
1: Uninstall your 64-bit BOINC-client.
2: Delete the new data-directory, created by the 64-bit client (since you've not attached to any project, you won't lose anything).
3: Download a 32-bit v6.10.xx-client, and install it, making sure it's installing at the same program-directory as the old v6.2.28-client used. Data-directory can be default or wherever you want to place it...
4: If on start of new installation all old info is now back, exit BOINC.
5: Uninstall the 32-bit BOINC-client, and re-install the 64-bit BOINC-client.

If on the other hand you did attach with the 64-bit client, and has started using it...
You can try setting "no new work", abort any unstarted work, and finish any other current work, upload & report. Afterwards, follow step 1-5.

If you're going to try manual copying...

On uninstallation, v6.2.xx will have put everything into the BOINC program-directory, so you'll find everything there. And yes, as you've mentioned, the default is "c:\program files (x86)\BOINC", while 64-bit is without the (x86)-part...

You'll need to copy:
1: Project-directory and Slots-directory, and all sub-directories.
2: account_*.xml (one for each BOINC-project, if only attached to WCG, it's account_www.worldcommunitygrid.org.xml)
3: client_state.xml

Any other files is optional, but it's still a good idea to include them:
4: cc_config.xml (if present).
5: daily_xfer_history.xml (only present in v6.10.xx and later)
6: global_prefs.xml and global_prefs_override.xml (the last doesn't need to be present).
7: gui_rpc_auth.cfg
8: job_log_*.txt (one for each BOINC-project).
9: remote_hosts.cfg (if configured remote BOINC-access).
10: statistics_*.xml (one for each BOINC-project).
11: time_stats_log (maybe only present in v6.6.xx and later, don't remember).
12: Any *.txt-files and *.old-files

If you've attached to account manager, there's also some additional files, but don't remember these at this point...

I am glad that Ingleside's help allowed a successful recovery of your WUs.

For the next time, or for other readers of this thread:
1. Use your message log to take note of the path to your BOINC data directory
2. (optional) make a backup copy of the BOINC data directory
3. Use the Advanced installation mode to check that it is pointing correctly to your data directory, and correct it if not.

With these steps you should go on with your current WUs without any trouble, even when upgrading from 6.2.28.
If you want to stay with a WCG version pick the latest one (6.10.57 currently) at the bottom of this list: All BOINC Downloads. It is still not the recommended WCG version but I am running it for weeks in three machines without any problem.