When I loaded 6.4.5 it didn't keep any of my projects, work queue or work in progress. This means that I will have problems with any project that has a quota until the work I had is overdue. That's really poor citizenship on your part.

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OK, which version did you install from?
On which operating system?

What happens when you uninstall this BOINC through Add/remove programs?
That should remigrate everything into the c:\program files\BOINC directory again... so check if that's true, that everything is there.

When you reinstall BOINC 6.4.5 do make sure you:
1. Separate the BOINC and BOINC Data directories. They can no longer be put in one directory.
2. That you reboot or log off/log back on before trying to run BOINC again.

As seen in the other thread on this subject, you didn't by chance go from a 64bit version of BOINC back to the 32bit version, did you? As then your old BOINC still lives in a different directory!

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After over 80 hours of a year-long ClimatePrediction project I was working on were finished, I started receiving constant error messages regarding that project running on 6.4.5. I wish I had copied the message down now, but I believe it said there was a Fortran error (not being a programmer, etc., it was all Greek to me.) Should it happen again, I will be certain to copy what it says. I thought it would be in my log but my log wiped too. Anyway, I reset the project and lost my work completely. It is downloading a new project due in December of 2009 (Climate Prediction work units are nearly 300 hours long.) I was wondering if anyone else had this problem occur and if they knew what the deal was/is.

Thank you Dagorath, I'll do that. Merry Christmas!