Notes about the 261 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The 261 file type is primarily associated with 'H.261 Encoded Video File'. This extension is more usually .P64.
Detailed information for file extension 261:
Primary association: H.261 Encoded Video File
Other applications associated with file type 261:
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
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System Info for File Extension .261
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly
from user systems.
EXEFile: %ProgramFiles%\ptc\proeWildfire 3.0\bin\proe.exe